Five Weeks in a Balloon by Jules Verne (page 2)

The car, which was of a circular form and fifteen feet in diameter, was made of wicker-work, strengthened with a slight covering of iron, and protected below by a system of elastic springs, to deaden the shock of collision. Its weight, along with that of the network, did not exceed two hundred and fifty pounds.

In addition to the above, the doctor caused to be constructed two sheet-iron chests two lines in thickness. These were connected by means of pipes furnished with stopcocks. He joined to these a spiral, two inches in diameter, which terminated in two branch pieces of unequal length, the longer of which, however, was twenty-five feet in height and the shorter only fifteen feet.

These sheet-iron chests were embedded in the car in such a way as to take up the least possible amount of space. The spiral, which was not to be adjusted until some future moment, was packed up, separately, along with a very strong Buntzen electric battery. This apparatus had been so ingeniously combined that it did not weigh more than seven hundred pounds, even including twenty-five gallons of water in another receptacle.

The instruments provided for the journey consisted of two barometers, two thermometers, two compasses, a sextant, two chronometers, an artificial horizon, and an altazimuth, to throw out the height of distant and inaccessible objects.

The Greenwich Observatory had placed itself at the doctor’s disposal. The latter, however, did not intend to make experiments in physics; he merely wanted to be able to know in what direction he was passing, and to determine the position of the principal rivers, mountains, and towns.

He also provided himself with three thoroughly tested iron anchors, and a light but strong silk ladder fifty feet in length.

He at the same time carefully weighed his stores of provision, which consisted of tea, coffee, biscuit, salted meat, and pemmican, a preparation which comprises many nutritive elements in a small space. Besides a sufficient stock of pure brandy, he arranged two water-tanks, each of which contained twenty-two gallons.

The consumption of these articles would necessarily, little by little, diminish the weight to be sustained, for it must be remembered that the equilibrium of a balloon floating in the atmosphere is extremely sensitive. The loss of an almost insignificant weight suffices to produce a very noticeable displacement.

Nor did the doctor forget an awning to shelter the car, nor the coverings and blankets that were to be the bedding of the journey, nor some fowling pieces and rifles, with their requisite supply of powder and ball.

Here is the summing up of his various items, and their weight, as he computed it:

Ferguson……………………… 135 pounds. Kennedy………………………. 153 ” Joe………………………….. 120 ” Weight of the outside balloon…… 650 ” Weight of the second balloon……. 510 ” Car and network……………….. 280 ” Anchors, instruments, awnings,
and sundry utensils, guns,
coverings, etc………………. 190 ” Meat, pemmican, biscuits, tea,
coffee, brandy………………. 386 ” Water………………………… 400 ” Apparatus…………………….. 700 ” Weight of the hydrogen…………. 276 ” Ballast………………………. 200 ” —–
4,000 pounds.

Such were the items of the four thousand pounds that Dr. Ferguson proposed to carry up with him. He took only two hundred pounds of ballast for “unforeseen emergencies,” as he remarked, since otherwise he did not expect to use any, thanks to the peculiarity of his apparatus.

CHAPTER EIGHTH.

Joe’s Importance.–The Commander of the Resolute.–Kennedy’s Arsenal.–Mutual Amenities.–The Farewell Dinner.–Departure on the 21st of February.–The Doctor’s Scientific Sessions.– Duveyrier.–Livingstone.–Details of the Aerial Voyage.–Kennedy silenced.

About the 10th of February, the preparations were pretty well completed; and the balloons, firmly secured, one within the other, were altogether finished. They had been subjected to a powerful pneumatic pressure in all parts, and the test gave excellent evidence of their solidity and of the care applied in their construction.

Joe hardly knew what he was about, with delight. He trotted incessantly to and fro between his home in Greek Street, and the Mitchell establishment, always full of business, but always in the highest spirits, giving details of the affair to people who did not even ask him, so proud was he, above all things, of being permitted to accompany his master. I have even a shrewd suspicion that what with showing the balloon, explaining the plans and views of the doctor, giving folks a glimpse of the latter, through a half-opened window, or pointing him out as he passed along the streets, the clever scamp earned a few half-crowns, but we must not find fault with him for that. He had as much right as anybody else to speculate upon the admiration and curiosity of his contemporaries.

On the 16th of February, the Resolute cast anchor near Greenwich. She was a screw propeller of eight hundred tons, a fast sailer, and the very vessel that had been sent out to the polar regions, to revictual the last expedition of Sir James Ross. Her commander, Captain Bennet, had the name of being a very amiable person, and he took a particular interest in the doctor’s expedition, having been one of that gentleman’s admirers for a long time. Bennet was rather a man of science than a man of war, which did not, however, prevent his vessel from carrying four carronades, that had never hurt any body, to be sure, but had performed the most pacific duty in the world.

The hold of the Resolute was so arranged as to find a stowing-place for the balloon. The latter was shipped with the greatest precaution on the 18th of February, and was then carefully deposited at the bottom of the vessel in such a way as to prevent accident. The car and its accessories, the anchors, the cords, the supplies, the water-tanks, which were to be filled on arriving, all were embarked and put away under Ferguson’s own eyes.

Ten tons of sulphuric acid and ten tons of iron filings, were put on board for the future production of the hydrogen gas. The quantity was more than enough, but it was well to be provided against accident. The apparatus to be employed in manufacturing the gas, including some thirty empty casks, was also stowed away in the hold.

These various preparations were terminated on the 18th of February, in the evening. Two state-rooms, comfortably fitted up, were ready for the reception of Dr. Ferguson and his friend Kennedy. The latter, all the while swearing that he would not go, went on board with a regular arsenal of hunting weapons, among which were two double-barrelled breech-loading fowling-pieces, and a rifle that had withstood every test, of the make of Purdey, Moore & Dickson, at Edinburgh. With such a weapon a marksman would find no difficulty in lodging a bullet in the eye of a chamois at the distance of two thousand paces. Along with these implements, he had two of Colt’s six-shooters, for unforeseen emergencies. His powder-case, his cartridge-pouch, his lead, and his bullets, did not exceed a certain weight prescribed by the doctor.

The three travellers got themselves to rights on board during the working-hours of February 19th. They were received with much distinction by the captain and his officers, the doctor continuing as reserved as ever, and thinking of nothing but his expedition. Dick seemed a good deal moved, but was unwilling to betray it; while Joe was fairly dancing and breaking out in laughable remarks. The worthy fellow soon became the jester and merry-andrew of the boatswain’s mess, where a berth had been kept for him.

On the 20th, a grand farewell dinner was given to Dr. Ferguson and Kennedy by the Royal Geographical Society. Commander Bennet and his officers were present at the entertainment, which was signalized by copious libations and numerous toasts. Healths were drunk, in sufficient abundance to guarantee all the guests a lifetime of centuries. Sir Francis M—- presided, with restrained but dignified feeling.

To his own supreme confusion, Dick Kennedy came in for a large share in the jovial felicitations of the night. After having drunk to the “intrepid Ferguson, the glory of England,” they had to drink to “the no less courageous Kennedy, his daring companion.”

Dick blushed a good deal, and that passed for modesty; whereupon the applause redoubled, and Dick blushed again.

A message from the Queen arrived while they were at dessert. Her Majesty offered her compliments to the two travellers, and expressed her wishes for their safe and successful journey. This, of course, rendered imperative fresh toasts to “Her most gracious Majesty.”

At midnight, after touching farewells and warm shaking of hands, the guests separated.

The boats of the Resolute were in waiting at the stairs of Westminster Bridge. The captain leaped in, accompanied by his officers and passengers, and the rapid current of the Thames, aiding the strong arms of the rowers, bore them swiftly to Greenwich. In an hour’s time all were asleep on board.

The next morning, February 21st, at three o’clock, the furnaces began to roar; at five, the anchors were weighed, and the Resolute, powerfully driven by her screw, began to plough the water toward the mouth of the Thames.

It is needless to say that the topic of conversation with every one on board was Dr. Ferguson’s enterprise. Seeing and hearing the doctor soon inspired everybody with such confidence that, in a very short time, there was no one, excepting the incredulous Scotchman, on the steamer who had the least doubt of the perfect feasibility and success of the expedition.

During the long, unoccupied hours of the voyage, the doctor held regular sittings, with lectures on geographical science, in the officers’ mess-room. These young men felt an intense interest in the discoveries made during the last forty years in Africa; and the doctor related to them the explorations of Barth, Burton, Speke, and Grant, and depicted the wonders of this vast, mysterious country, now thrown open on all sides to the investigations of science. On the north, the young Duveyrier was exploring Sahara, and bringing the chiefs of the Touaregs to Paris. Under the inspiration of the French Government, two expeditions were preparing, which, descending from the north, and coming from the west, would cross each other at Timbuctoo. In the south, the indefatigable Livingstone was still advancing toward the equator; and, since March, 1862, he had, in company with Mackenzie, ascended the river Rovoonia. The nineteenth century would, assuredly, not pass, contended the doctor, without Africa having been compelled to surrender the secrets she has kept locked up in her bosom for six thousand years.

But the interest of Dr. Ferguson’s hearers was excited to the highest pitch when he made known to them, in detail, the preparations for his own journey. They took pleasure in verifying his calculations; they discussed them; and the doctor frankly took part in the discussion.

As a general thing, they were surprised at the limited quantity of provision that he took with him; and one day one of the officers questioned him on that subject.

“That peculiar point astonishes you, does it?” said Ferguson.

“It does, indeed.”

“But how long do you think my trip is going to last? Whole months? If so, you are greatly mistaken. Were it to be a long one, we should be lost; we should never get back. But you must know that the distance from Zanzibar to the coast of Senegal is only thirty-five hundred–say four thousand miles. Well, at the rate of two hundred and forty miles every twelve hours, which does not come near the rapidity of our railroad trains, by travelling day and night, it would take only seven days to cross Africa!”

“But then you could see nothing, make no geographical observations, or reconnoitre the face of the country.”

“Ah!” replied the doctor, “if I am master of my balloon–if I can ascend and descend at will, I shall stop when I please, especially when too violent currents of air threaten to carry me out of my way with them.”

“And you will encounter such,” said Captain Bennet. “There are tornadoes that sweep at the rate of more than two hundred and forty miles per hour.”

“You see, then, that with such speed as that, we could cross Africa in twelve hours. One would rise at Zanzibar, and go to bed at St. Louis!”

“But,” rejoined the officer, “could any balloon withstand the wear and tear of such velocity?”

“It has happened before,” replied Ferguson.

“And the balloon withstood it?”

“Perfectly well. It was at the time of the coronation of Napoleon, in 1804. The aeronaut, Gernerin, sent up a balloon at Paris, about eleven o’clock in the evening. It bore the following inscription, in letters of gold: ‘Paris, 25 Frimaire; year XIII; Coronation of the Emperor Napoleon by his Holiness, Pius VII.’ On the next morning, the inhabitants of Rome saw the same balloon soaring above the Vatican, whence it crossed the Campagna, and finally fluttered down into the lake of Bracciano. So you see, gentlemen, that a balloon can resist such velocities.”

“A balloon–that might be; but a man?” insinuated Kennedy.

“Yes, a man, too!–for the balloon is always motionless with reference to the air that surrounds it. What moves is the mass of the atmosphere itself: for instance, one may light a taper in the car, and the flame will not even waver. An aeronaut in Garnerin’s balloon would not have suffered in the least from the speed. But then I have no occasion to attempt such velocity; and if I can anchor to some tree, or some favorable inequality of the ground, at night, I shall not fail to do so. Besides, we take provision for two months with us, after all; and there is nothing to prevent our skilful huntsman here from furnishing game in abundance when we come to alight.”

“Ah! Mr. Kennedy,” said a young midshipman, with envious eyes, “what splendid shots you’ll have!”

“Without counting,” said another, “that you’ll have the glory as well as the sport!”

“Gentlemen,” replied the hunter, stammering with confusion, “I greatly–appreciate–your compliments– but they–don’t–belong to me.”

“You!” exclaimed every body, “don’t you intend to go?”

“I am not going!”

“You won’t accompany Dr. Ferguson?”

“Not only shall I not accompany him, but I am here so as to be present at the last moment to prevent his going.”

Every eye was now turned to the doctor.

“Never mind him!” said the latter, calmly. “This is a matter that we can’t argue with him. At heart he knows perfectly well that he IS going.”

“By Saint Andrew!” said Kennedy, “I swear–“

“Swear to nothing, friend Dick; you have been ganged and weighed–you and your powder, your guns, and your bullets; so don’t let us say anything more about it.”

And, in fact, from that day until the arrival at Zanzibar, Dick never opened his mouth. He talked neither about that nor about anything else. He kept absolutely silent.

CHAPTER NINTH.

They double the Cape.–The Forecastle.–A Course of Cosmography by Professor Joe.–Concerning the Method of guiding Balloons.–How to seek out Atmospheric Currents.–Eureka.

The Resolute plunged along rapidly toward the Cape of Good Hope, the weather continuing fine, although the sea ran heavier.

On the 30th of March, twenty-seven days after the departure from London, the Table Mountain loomed up on the horizon. Cape City lying at the foot of an amphitheatre of hills, could be distinguished through the ship’s glasses, and soon the Resolute cast anchor in the port. But the captain touched there only to replenish his coal bunkers, and that was but a day’s job. On the morrow, he steered away to the south’ard, so as to double the southernmost point of Africa, and enter the Mozambique Channel.

This was not Joe’s first sea-voyage, and so, for his part, he soon found himself at home on board; every body liked him for his frankness and good-humor. A considerable share of his master’s renown was reflected upon him. He was listened to as an oracle, and he made no more mistakes than the next one.

So, while the doctor was pursuing his descriptive course of lecturing in the officers’ mess, Joe reigned supreme on the forecastle, holding forth in his own peculiar manner, and making history to suit himself–a style of procedure pursued, by the way, by the greatest historians of all ages and nations.

The topic of discourse was, naturally, the aerial voyage. Joe had experienced some trouble in getting the rebellious spirits to believe in it; but, once accepted by them, nothing connected with it was any longer an impossibility to the imaginations of the seamen stimulated by Joe’s harangues.

Our dazzling narrator persuaded his hearers that, after this trip, many others still more wonderful would be undertaken. In fact, it was to be but the first of a long series of superhuman expeditions.

“You see, my friends, when a man has had a taste of that kind of travelling, he can’t get along afterward with any other; so, on our next expedition, instead of going off to one side, we’ll go right ahead, going up, too, all the time.”

“Humph! then you’ll go to the moon!” said one of the crowd, with a stare of amazement.

“To the moon!” exclaimed Joe, “To the moon! pooh! that’s too common. Every body might go to the moon, that way. Besides, there’s no water there, and you have to carry such a lot of it along with you. Then you have to take air along in bottles, so as to breathe.”

“Ay! ay! that’s all right! But can a man get a drop of the real stuff there?” said a sailor who liked his toddy.

“Not a drop!” was Joe’s answer. “No! old fellow, not in the moon. But we’re going to skip round among those little twinklers up there–the stars–and the splendid planets that my old man so often talks about. For instance, we’ll commence with Saturn–“

“That one with the ring?” asked the boatswain.

“Yes! the wedding-ring–only no one knows what’s become of his wife!”

“What? will you go so high up as that?” said one of the ship-boys, gaping with wonder. “Why, your master must be Old Nick himself.”

“Oh! no, he’s too good for that.”

“But, after Saturn–what then?” was the next inquiry of his impatient audience.

“After Saturn? Well, we’ll visit Jupiter. A funny place that is, too, where the days are only nine hours and a half long–a good thing for the lazy fellows–and the years, would you believe it–last twelve of ours, which is fine for folks who have only six months to live. They get off a little longer by that.”

“Twelve years!” ejaculated the boy.

“Yes, my youngster; so that in that country you’d be toddling after your mammy yet, and that old chap yonder, who looks about fifty, would only be a little shaver of four and a half.”

“Blazes! that’s a good ‘un!” shouted the whole forecastle together.

“Solemn truth!” said Joe, stoutly.

“But what can you expect? When people will stay in this world, they learn nothing and keep as ignorant as bears. But just come along to Jupiter and you’ll see. But they have to look out up there, for he’s got satellites that are not just the easiest things to pass.”

All the men laughed, but they more than half believed him. Then he went on to talk about Neptune, where seafaring men get a jovial reception, and Mars, where the military get the best of the sidewalk to such an extent that folks can hardly stand it. Finally, he drew them a heavenly picture of the delights of Venus.

“And when we get back from that expedition,” said the indefatigable narrator, “they’ll decorate us with the Southern Cross that shines up there in the Creator’s button-hole.”

“Ay, and you’d have well earned it!” said the sailors.

Thus passed the long evenings on the forecastle in merry chat, and during the same time the doctor went on with his instructive discourses.

One day the conversation turned upon the means of directing balloons, and the doctor was asked his opinion about it.

“I don’t think,” said he, “that we shall succeed in finding out a system of directing them. I am familiar with all the plans attempted and proposed, and not one has succeeded, not one is practicable. You may readily understand that I have occupied my mind with this subject, which was, necessarily, so interesting to me, but I have not been able to solve the problem with the appliances now known to mechanical science. We would have to discover a motive power of extraordinary force, and almost impossible lightness of machinery. And, even then, we could not resist atmospheric currents of any considerable strength. Until now, the effort has been rather to direct the car than the balloon, and that has been one great error.”

“Still there are many points of resemblance between a balloon and a ship which is directed at will.”

“Not at all,” retorted the doctor, “there is little or no similarity between the two cases. Air is infinitely less dense than water, in which the ship is only half submerged, while the whole bulk of a balloon is plunged in the atmosphere, and remains motionless with reference to the element that surrounds it.”

“You think, then, that aerostatic science has said its last word?”

“Not at all! not at all! But we must look for another point in the case, and if we cannot manage to guide our balloon, we must, at least, try to keep it in favorable aerial currents. In proportion as we ascend, the latter become much more uniform and flow more constantly in one direction. They are no longer disturbed by the mountains and valleys that traverse the surface of the globe, and these, you know, are the chief cause of the variations of the wind and the inequality of their force. Therefore, these zones having been once determined, the balloon will merely have to be placed in the currents best adapted to its destination.”

“But then,” continued Captain Bennet, “in order to reach them, you must keep constantly ascending or descending. That is the real difficulty, doctor.”

“And why, my dear captain?”

“Let us understand one another. It would be a difficulty and an obstacle only for long journeys, and not for short aerial excursions.”

“And why so, if you please?”

“Because you can ascend only by throwing out ballast; you can descend only after letting off gas, and by these processes your ballast and your gas are soon exhausted.”

“My dear sir, that’s the whole question. There is the only difficulty that science need now seek to overcome. The problem is not how to guide the balloon, but how to take it up and down without expending the gas which is its strength, its life-blood, its soul, if I may use the expression.”

“You are right, my dear doctor; but this problem is not yet solved; this means has not yet been discovered.”

“I beg your pardon, it HAS been discovered.”

“By whom?”

“By me!”

“By you?”

“You may readily believe that otherwise I should not have risked this expedition across Africa in a balloon. In twenty-four hours I should have been without gas!”

“But you said nothing about that in England?”

“No! I did not want to have myself overhauled in public. I saw no use in that. I made my preparatory experiments in secret and was satisfied. I have no occasion, then, to learn any thing more from them.”

“Well! doctor, would it be proper to ask what is your secret?”

“Here it is, gentlemen–the simplest thing in the world!”

The attention of his auditory was now directed to the doctor in the utmost degree as he quietly proceeded with his explanation.

CHAPTER TENTH.

Former Experiments.–The Doctor’s Five Receptacles.–The Gas Cylinder.– The Calorifere.–The System of Manoeuvring.–Success certain.

“The attempt has often been made, gentlemen,” said the doctor, “to rise and descend at will, without losing ballast or gas from the balloon. A French aeronaut, M. Meunier, tried to accomplish this by compressing air in an inner receptacle. A Belgian, Dr. Van Hecke, by means of wings and paddles, obtained a vertical power that would have sufficed in most cases, but the practical results secured from these experiments have been insignificant.

“I therefore resolved to go about the thing more directly; so, at the start, I dispensed with ballast altogether, excepting as a provision for cases of special emergency, such as the breakage of my apparatus, or the necessity of ascending very suddenly, so as to avoid unforeseen obstacles.

“My means of ascent and descent consist simply in dilating or contracting the gas that is in the balloon by the application of different temperatures, and here is the method of obtaining that result.

“You saw me bring on board with the car several cases or receptacles, the use of which you may not have understood. They are five in number.

“The first contains about twenty-five gallons of water, to which I add a few drops of sulphuric acid, so as to augment its capacity as a conductor of electricity, and then I decompose it by means of a powerful Buntzen battery. Water, as you know, consists of two parts of hydrogen to one of oxygen gas.

“The latter, through the action of the battery, passes at its positive pole into the second receptacle. A third receptacle, placed above the second one, and of double its capacity, receives the hydrogen passing into it by the negative pole.

“Stopcocks, of which one has an orifice twice the size of the other, communicate between these receptacles and a fourth one, which is called the mixture reservoir, since in it the two gases obtained by the decomposition of the water do really commingle. The capacity of this fourth tank is about forty-one cubic feet.

“On the upper part of this tank is a platinum tube provided with a stopcock.

“You will now readily understand, gentlemen, the apparatus that I have described to you is really a gas cylinder and blow-pipe for oxygen and hydrogen, the heat of which exceeds that of a forge fire.

“This much established, I proceed to the second part of my apparatus. From the lowest part of my balloon, which is hermetically closed, issue two tubes a little distance apart. The one starts among the upper layers of the hydrogen gas, the other amid the lower layers.

“These two pipes are provided at intervals with strong jointings of india-rubber, which enable them to move in harmony with the oscillations of the balloon.

“Both of them run down as far as the car, and lose themselves in an iron receptacle of cylindrical form, which is called the heat-tank. The latter is closed at its two ends by two strong plates of the same metal.

“The pipe running from the lower part of the balloon runs into this cylindrical receptacle through the lower plate; it penetrates the latter and then takes the form of a helicoidal or screw-shaped spiral, the rings of which, rising one over the other, occupy nearly the whole of the height of the tank. Before again issuing from it, this spiral runs into a small cone with a concave base, that is turned downward in the shape of a spherical cap.

“It is from the top of this cone that the second pipe issues, and it runs, as I have said, into the upper beds of the balloon.

“The spherical cap of the small cone is of platinum, so as not to melt by the action of the cylinder and blow-pipe, for the latter are placed upon the bottom of the iron tank in the midst of the helicoidal spiral, and the extremity of their flame will slightly touch the cap in question.

“You all know, gentlemen, what a calorifere, to heat apartments, is. You know how it acts. The air of the apartments is forced to pass through its pipes, and is then released with a heightened temperature. Well, what I have just described to you is nothing more nor less than a calorifere.

“In fact, what is it that takes place? The cylinder once lighted, the hydrogen in the spiral and in the concave cone becomes heated, and rapidly ascends through the pipe that leads to the upper part of the balloon. A vacuum is created below, and it attracts the gas in the lower parts; this becomes heated in its turn, and is continually replaced; thus, an extremely rapid current of gas is established in the pipes and in the spiral, which issues from the balloon and then returns to it, and is heated over again, incessantly.

“Now, the cases increase 1/480 of their volume for each degree of heat applied. If, then, I force the temperature 18 degrees, the hydrogen of the balloon will dilate 18/480 or 1614 cubic feet, and will, therefore, displace 1614 more cubic feet of air, which will increase its ascensional power by 160 pounds. This is equivalent to throwing out that weight of ballast. If I augment the temperature by 180 degrees, the gas will dilate 180/480 and will displace 16,740 cubic feet more, and its ascensional force will be augmented by 1,600 pounds.

“Thus, you see, gentlemen, that I can easily effect very considerable changes of equilibrium. The volume of the balloon has been calculated in such manner that, when half inflated, it displaces a weight of air exactly equal to that of the envelope containing the hydrogen gas, and of the car occupied by the passengers, and all its apparatus and accessories. At this point of inflation, it is in exact equilibrium with the air, and neither mounts nor descends.

“In order, then, to effect an ascent, I give the gas a temperature superior to the temperature of the surrounding air by means of my cylinder. By this excess of heat it obtains a larger distention, and inflates the balloon more. The latter, then, ascends in proportion as I heat the hydrogen.

“The descent, of course, is effected by lowering the heat of the cylinder, and letting the temperature abate. The ascent would be, usually, more rapid than the descent; but that is a fortunate circumstance, since it is of no importance to me to descend rapidly, while, on the other hand, it is by a very rapid ascent that I avoid obstacles. The real danger lurks below, and not above.

“Besides, as I have said, I have a certain quantity of ballast, which will enable me to ascend more rapidly still, when necessary. My valve, at the top of the balloon, is nothing more nor less than a safety-valve. The balloon always retains the same quantity of hydrogen, and the variations of temperature that I produce in the midst of this shut-up gas are, of themselves, sufficient to provide for all these ascending and descending movements.

“Now, gentlemen, as a practical detail, let me add this:

“The combustion of the hydrogen and of the oxygen at the point of the cylinder produces solely the vapor or steam of water. I have, therefore, provided the lower part of the cylindrical iron box with a scape-pipe, with a valve operating by means of a pressure of two atmospheres; consequently, so soon as this amount of pressure is attained, the steam escapes of itself.

“Here are the exact figures: 25 gallons of water, separated into its constituent elements, yield 200 pounds of oxygen and 25 pounds of hydrogen. This represents, at atmospheric tension, 1,800 cubic feet of the former and 3,780 cubic feet of the latter, or 5,670 cubic feet, in all, of the mixture. Hence, the stopcock of my cylinder, when fully open, expends 27 cubic feet per hour, with a flame at least six times as strong as that of the large lamps used for lighting streets. On an average, then, and in order to keep myself at a very moderate elevation, I should not burn more than nine cubic feet per hour, so that my twenty-five gallons of water represent six hundred and thirty-six hours of aerial navigation, or a little more than twenty-six days.

“Well, as I can descend when I please, to replenish my stock of water on the way, my trip might be indefinitely prolonged.

“Such, gentlemen, is my secret. It is simple, and, like most simple things, it cannot fail to succeed. The dilation and contraction of the gas in the balloon is my means of locomotion, which calls for neither cumbersome wings, nor any other mechanical motor. A calorifere to produce the changes of temperature, and a cylinder to generate the heat, are neither inconvenient nor heavy. I think, therefore, that I have combined all the elements of success.”

Dr. Ferguson here terminated his discourse, and was most heartily applauded. There was not an objection to make to it; all had been foreseen and decided.

“However,” said the captain, “the thing may prove dangerous.”

“What matters that,” replied the doctor, “provided that it be practicable?”

CHAPTER ELEVENTH.

The Arrival at Zanzibar.–The English Consul.–Ill-will of the Inhabitants.–The Island of Koumbeni.–The Rain-Makers.–Inflation of the Balloon.–Departure on the 18th of April.–The last Good-by. –The Victoria.

An invariably favorable wind had accelerated the progress of the Resolute toward the place of her destination. The navigation of the Mozambique Channel was especially calm and pleasant. The agreeable character of the trip by sea was regarded as a good omen of the probable issue of the trip through the air. Every one looked forward to the hour of arrival, and sought to give the last touch to the doctor’s preparations.

At length the vessel hove in sight of the town of Zanzibar, upon the island of the same name, and, on the 15th of April, at 11 o’clock in the morning, she anchored in the port.

The island of Zanzibar belongs to the Imaum of Muscat, an ally of France and England, and is, undoubtedly, his finest settlement. The port is frequented by a great many vessels from the neighboring countries.

The island is separated from the African coast only by a channel, the greatest width of which is but thirty miles.

It has a large trade in gums, ivory, and, above all, in “ebony,” for Zanzibar is the great slave-market. Thither converges all the booty captured in the battles which the chiefs of the interior are continually fighting. This traffic extends along the whole eastern coast, and as far as the Nile latitudes. Mr. G. Lejean even reports that he has seen it carried on, openly, under the French flag.

Upon the arrival of the Resolute, the English consul at Zanzibar came on board to offer his services to the doctor, of whose projects the European newspapers had made him aware for a month past. But, up to that moment, he had remained with the numerous phalanx of the incredulous.

“I doubted,” said he, holding out his hand to Dr. Ferguson, “but now I doubt no longer.”

He invited the doctor, Kennedy, and the faithful Joe, of course, to his own dwelling. Through his courtesy, the doctor was enabled to have knowledge of the various letters that he had received from Captain Speke. The captain and his companions had suffered dreadfully from hunger and bad weather before reaching the Ugogo country. They could advance only with extreme difficulty, and did not expect to be able to communicate again for a long time.

“Those are perils and privations which we shall manage to avoid,” said the doctor.

The baggage of the three travellers was conveyed to the consul’s residence. Arrangements were made for disembarking the balloon upon the beach at Zanzibar. There was a convenient spot, near the signal-mast, close by an immense building, that would serve to shelter it from the east winds. This huge tower, resembling a tun standing on one end, beside which the famous Heidelberg tun would have seemed but a very ordinary barrel, served as a fortification, and on its platform were stationed Belootchees, armed with lances. These Belootchees are a kind of brawling, good-for-nothing Janizaries.

But, when about to land the balloon, the consul was informed that the population of the island would oppose their doing so by force. Nothing is so blind as fanatical passion. The news of the arrival of a Christian, who was to ascend into the air, was received with rage. The negroes, more exasperated than the Arabs, saw in this project an attack upon their religion. They took it into their heads that some mischief was meant to the sun and the moon. Now, these two luminaries are objects of veneration to the African tribes, and they determined to oppose so sacrilegious an enterprise.

The consul, informed of their intentions, conferred with Dr. Ferguson and Captain Bennet on the subject. The latter was unwilling to yield to threats, but his friend dissuaded him from any idea of violent retaliation.

“We shall certainly come out winners,” he said. “Even the imaum’s soldiers will lend us a hand, if we need it. But, my dear captain, an accident may happen in a moment, and it would require but one unlucky blow to do the balloon an irreparable injury, so that the trip would be totally defeated; therefore we must act with the greatest caution.”

“But what are we to do? If we land on the coast of Africa, we shall encounter the same difficulties. What are we to do?”

“Nothing is more simple,” replied the consul. “You observe those small islands outside of the port; land your balloon on one of them; surround it with a guard of sailors, and you will have no risk to run.”

“Just the thing!” said the doctor, “and we shall be entirely at our ease in completing our preparations.”

The captain yielded to these suggestions, and the Resolute was headed for the island of Koumbeni. During the morning of the 16th April, the balloon was placed in safety in the middle of a clearing in the great woods, with which the soil is studded.

Two masts, eighty feet in height, were raised at the same distance from each other. Blocks and tackle, placed at their extremities, afforded the means of elevating the balloon, by the aid of a transverse rope. It was then entirely uninflated. The interior balloon was fastened to the exterior one, in such manner as to be lifted up in the same way. To the lower end of each balloon were fixed the pipes that served to introduce the hydrogen gas.

The whole day, on the 17th, was spent in arranging the apparatus destined to produce the gas; it consisted of some thirty casks, in which the decomposition of water was effected by means of iron-filings and sulphuric acid placed together in a large quantity of the first-named fluid. The hydrogen passed into a huge central cask, after having been washed on the way, and thence into each balloon by the conduit-pipes. In this manner each of them received a certain accurately-ascertained quantity of gas. For this purpose, there had to be employed eighteen hundred and sixty-six pounds of sulphuric acid, sixteen thousand and fifty pounds of iron, and nine thousand one hundred and sixty-six gallons of water. This operation commenced on the following night, about three A.M., and lasted nearly eight hours. The next day, the balloon, covered with its network, undulated gracefully above its car, which was held to the ground by numerous sacks of earth. The inflating apparatus was put together with extreme care, and the pipes issuing from the balloon were securely fitted to the cylindrical case.

The anchors, the cordage, the instruments, the travelling-wraps, the awning, the provisions, and the arms, were put in the place assigned to them in the car. The supply of water was procured at Zanzibar. The two hundred pounds of ballast were distributed in fifty bags placed at the bottom of the car, but within arm’s-reach.

These preparations were concluded about five o’clock in the evening, while sentinels kept close watch around the island, and the boats of the Resolute patrolled the channel.

The blacks continued to show their displeasure by grimaces and contortions. Their obi-men, or wizards, went up and down among the angry throngs, pouring fuel on the flame of their fanaticism; and some of the excited wretches, more furious and daring than the rest, attempted to get to the island by swimming, but they were easily driven off.

Thereupon the sorceries and incantations commenced; the “rain-makers,” who pretend to have control over the clouds, invoked the storms and the “stone-showers,” as the blacks call hail, to their aid. To compel them to do so, they plucked leaves of all the different trees that grow in that country, and boiled them over a slow fire, while, at the same time, a sheep was killed by thrusting a long needle into its heart. But, in spite of all their ceremonies, the sky remained clear and beautiful, and they profited nothing by their slaughtered sheep and their ugly grimaces.

The blacks then abandoned themselves to the most furious orgies, and got fearfully drunk on “tembo,” a kind of ardent spirits drawn from the cocoa-nut tree, and an extremely heady sort of beer called “togwa.” Their chants, which were destitute of all melody, but were sung in excellent time, continued until far into the night.

About six o’clock in the evening, the captain assembled the travellers and the officers of the ship at a farewell repast in his cabin. Kennedy, whom nobody ventured to question now, sat with his eyes riveted on Dr. Ferguson, murmuring indistinguishable words. In other respects, the dinner was a gloomy one. The approach of the final moment filled everybody with the most serious reflections. What had fate in store for these daring adventurers? Should they ever again find themselves in the midst of their friends, or seated at the domestic hearth? Were their travelling apparatus to fail, what would become of them, among those ferocious savage tribes, in regions that had never been explored, and in the midst of boundless deserts?

Such thoughts as these, which had been dim and vague until then, or but slightly regarded when they came up, returned upon their excited fancies with intense force at this parting moment. Dr. Ferguson, still cold and impassible, talked of this, that, and the other; but he strove in vain to overcome this infectious gloominess. He utterly failed.

As some demonstration against the personal safety of the doctor and his companions was feared, all three slept that night on board the Resolute. At six o’clock in the morning they left their cabin, and landed on the island of Koumbeni.

The balloon was swaying gently to and fro in the morning breeze; the sand-bags that had held it down were now replaced by some twenty strong-armed sailors, and Captain Bennet and his officers were present to witness the solemn departure of their friends.

At this moment Kennedy went right up to the doctor, grasped his hand, and said:

“Samuel, have you absolutely determined to go?”

“Solemnly determined, my dear Dick.”

“I have done every thing that I could to prevent this expedition, have I not?”

“Every thing!”

“Well, then, my conscience is clear on that score, and I will go with you.”

“I was sure you would!” said the doctor, betraying in his features swift traces of emotion.

At last the moment of final leave-taking arrived. The captain and his officers embraced their dauntless friends with great feeling, not excepting even Joe, who, worthy fellow, was as proud and happy as a prince. Every one in the party insisted upon having a final shake of the doctor’s hand.

At nine o’clock the three travellers got into their car. The doctor lit the combustible in his cylinder and turned the flame so as to produce a rapid heat, and the balloon, which had rested on the ground in perfect equipoise, began to rise in a few minutes, so that the seamen had to slacken the ropes they held it by. The car then rose about twenty feet above their heads.

“My friends!” exclaimed the doctor, standing up between his two companions, and taking off his hat, “let us give our aerial ship a name that will bring her good luck! let us christen her Victoria!”

This speech was answered with stentorian cheers of “Huzza for the Queen! Huzza for Old England!”

At this moment the ascensional force of the balloon increased prodigiously, and Ferguson, Kennedy, and Joe, waved a last good-by to their friends.

“Let go all!” shouted the doctor, and at the word the Victoria shot rapidly up into the sky, while the four carronades on board the Resolute thundered forth a parting salute in her honor.

CHAPTER TWELFTH

Crossing the Strait.–The Mrima.–Dick’s Remark and Joe’s Proposition.–A Recipe for Coffee-making.–The Uzaramo.–The Unfortunate Maizan.–Mount Dathumi.–The Doctor’s Cards.–Night under a Nopal.

The air was pure, the wind moderate, and the balloon ascended almost perpendicularly to a height of fifteen hundred feet, as indicated by a depression of two inches in the barometric column.

At this height a more decided current carried the balloon toward the southwest. What a magnificent spectacle was then outspread beneath the gaze of the travellers! The island of Zanzibar could be seen in its entire extent, marked out by its deeper color upon a vast planisphere; the fields had the appearance of patterns of different colors, and thick clumps of green indicated the groves and thickets.

The inhabitants of the island looked no larger than insects. The huzzaing and shouting were little by little lost in the distance, and only the discharge of the ship’s guns could be heard in the concavity beneath the balloon, as the latter sped on its flight.

“How fine that is!” said Joe, breaking silence for the first time.

He got no reply. The doctor was busy observing the variations of the barometer and noting down the details of his ascent.

Kennedy looked on, and had not eyes enough to take in all that he saw.

The rays of the sun coming to the aid of the heating cylinder, the tension of the gas increased, and the Victoria attained the height of twenty-five hundred feet.

The Resolute looked like a mere cockle-shell, and the African coast could be distinctly seen in the west marked out by a fringe of foam.

“You don’t talk?” said Joe, again.

“We are looking!” said the doctor, directing his spy-glass toward the mainland.

“For my part, I must talk!”

“As much as you please, Joe; talk as much as you like!”

And Joe went on alone with a tremendous volley of exclamations. The “ohs!” and the “ahs!” exploded one after the other, incessantly, from his lips.

During his passage over the sea the doctor deemed it best to keep at his present elevation. He could thus reconnoitre a greater stretch of the coast. The thermometer and the barometer, hanging up inside of the half-opened awning, were always within sight, and a second barometer suspended outside was to serve during the night watches.

At the end of about two hours the Victoria, driven along at a speed of a little more than eight miles, very visibly neared the coast of the mainland. The doctor, thereupon, determined to descend a little nearer to the ground. So he moderated the flame of his cylinder, and the balloon, in a few moments, had descended to an altitude only three hundred feet above the soil.

It was then found to be passing just over the Mrima country, the name of this part of the eastern coast of Africa. Dense borders of mango-trees protected its margin, and the ebb-tide disclosed to view their thick roots, chafed and gnawed by the teeth of the Indian Ocean. The sands which, at an earlier period, formed the coast-line, rounded away along the distant horizon, and Mount Nguru reared aloft its sharp summit in the northwest.

The Victoria passed near to a village which the doctor found marked upon his chart as Kaole. Its entire population had assembled in crowds, and were yelling with anger and fear, at the same time vainly directing their arrows against this monster of the air that swept along so majestically away above all their powerless fury.

The wind was setting to the southward, but the doctor felt no concern on that score, since it enabled him the better to follow the route traced by Captains Burton and Speke.

Kennedy had, at length, become as talkative as Joe, and the two kept up a continual interchange of admiring interjections and exclamations.

“Out upon stage-coaches!” said one.

“Steamers indeed!” said the other.

“Railroads! eh? rubbish!” put in Kennedy, “that you travel on, without seeing the country!”

“Balloons! they’re the sort for me!” Joe would add. “Why, you don’t feel yourself going, and Nature takes the trouble to spread herself out before one’s eyes!”

“What a splendid sight! What a spectacle! What a delight! a dream in a hammock!”

“Suppose we take our breakfast?” was Joe’s unpoetical change of tune, at last, for the keen, open air had mightily sharpened his appetite.

“Good idea, my boy!”

“Oh! it won’t take us long to do the cooking–biscuit and potted meat?”

“And as much coffee as you like,” said the doctor. “I give you leave to borrow a little heat from my cylinder. There’s enough and to spare, for that matter, and so we shall avoid the risk of a conflagration.”

“That would be a dreadful misfortune!” ejaculated Kennedy. “It’s the same as a powder-magazine suspended over our heads.”

“Not precisely,” said Ferguson, “but still if the gas were to take fire it would burn up gradually, and we should settle down on the ground, which would be disagreeable; but never fear–our balloon is hermetically sealed.”

“Let us eat a bite, then,” replied Kennedy.

“Now, gentlemen,” put in Joe, “while doing the same as you, I’m going to get you up a cup of coffee that I think you’ll have something to say about.”

“The fact is,” added the doctor, “that Joe, along with a thousand other virtues, has a remarkable talent for the preparation of that delicious beverage: he compounds it of a mixture of various origin, but he never would reveal to me the ingredients.”

“Well, master, since we are so far above-ground, I can tell you the secret. It is just to mix equal quantities of Mocha, of Bourbon coffee, and of Rio Nunez.”

A few moments later, three steaming cups of coffee were served, and topped off a substantial breakfast, which was additionally seasoned by the jokes and repartees of the guests. Each one then resumed his post of observation.

The country over which they were passing was remarkable for its fertility. Narrow, winding paths plunged in beneath the overarching verdure. They swept along above cultivated fields of tobacco, maize, and barley, at full maturity, and here and there immense rice-fields, full of straight stalks and purple blossoms. They could distinguish sheep and goats too, confined in large cages, set up on piles to keep them out of reach of the leopards’ fangs. Luxuriant vegetation spread in wild profuseness over this prodigal soil.

Village after village rang with yells of terror and astonishment at the sight of the Victoria, and Dr. Ferguson prudently kept her above the reach of the barbarian arrows. The savages below, thus baffled, ran together from their huddle of huts and followed the travellers with their vain imprecations while they remained in sight.

At noon, the doctor, upon consulting his map, calculated that they were passing over the Uzaramo* country. The soil was thickly studded with cocoa-nut, papaw, and cotton-wood trees, above which the balloon seemed to disport itself like a bird. Joe found this splendid vegetation a matter of course, seeing that they were in Africa. Kennedy descried some hares and quails that asked nothing better than to get a good shot from his fowling-piece, but it would have been powder wasted, since there was no time to pick up the game.

* U and Ou signify country in the language of that region.

The aeronauts swept on with the speed of twelve miles per hour, and soon were passing in thirty-eight degrees twenty minutes east longitude, over the village of Tounda.

“It was there,” said the doctor, “that Burton and Speke were seized with violent fevers, and for a moment thought their expedition ruined. And yet they were only a short distance from the coast, but fatigue and privation were beginning to tell upon them severely.”

In fact, there is a perpetual malaria reigning throughout the country in question. Even the doctor could hope to escape its effects only by rising above the range of the miasma that exhales from this damp region whence the blazing rays of the sun pump up its poisonous vapors. Once in a while they could descry a caravan resting in a “kraal,” awaiting the freshness and cool of the evening to resume its route. These kraals are wide patches of cleared land, surrounded by hedges and jungles, where traders take shelter against not only the wild beasts, but also the robber tribes of the country. They could see the natives running and scattering in all directions at the sight of the Victoria. Kennedy was keen to get a closer look at them, but the doctor invariably held out against the idea.

“The chiefs are armed with muskets,” he said, “and our balloon would be too conspicuous a mark for their bullets.”

“Would a bullet-hole bring us down?” asked Joe.

“Not immediately; but such a hole would soon become a large torn orifice through which our gas would escape.”

“Then, let us keep at a respectful distance from yon miscreants. What must they think as they see us sailing in the air? I’m sure they must feel like worshipping us!”

“Let them worship away, then,” replied the doctor, “but at a distance. There is no harm done in getting as far away from them as possible. See! the country is already changing its aspect: the villages are fewer and farther between; the mango-trees have disappeared, for their growth ceases at this latitude. The soil is becoming hilly and portends mountains not far off.”

“Yes,” said Kennedy, “it seems to me that I can see some high land on this side.”

“In the west–those are the nearest ranges of the Ourizara–Mount Duthumi, no doubt, behind which I hope to find shelter for the night. I’ll stir up the heat in the cylinder a little, for we must keep at an elevation of five or six hundred feet.”

“That was a grant idea of yours, sir,” said Joe. “It’s mighty easy to manage it; you turn a cock, and the thing’s done.”

“Ah! here we are more at our ease,” said the sportsman, as the balloon ascended; “the reflection of the sun on those red sands was getting to be insupportable.”

“What splendid trees!” cried Joe. “They’re quite natural, but they are very fine! Why a dozen of them would make a forest!”

“Those are baobabs,” replied Dr. Ferguson. “See, there’s one with a trunk fully one hundred feet in circumference. It was, perhaps, at the foot of that very tree that Maizan, the French traveller, expired in 1845, for we are over the village of Deje-la-Mhora, to which he pushed on alone. He was seized by the chief of this region, fastened to the foot of a baobab, and the ferocious black then severed all his joints while the war-song of his tribe was chanted; he then made a gash in the prisoner’s neck, stopped to sharpen his knife, and fairly tore away the poor wretch’s head before it had been cut from the body. The unfortunate Frenchman was but twenty-six years of age.”

“And France has never avenged so hideous a crime?” said Kennedy.

“France did demand satisfaction, and the Said of Zanzibar did all in his power to capture the murderer, but in vain.”

“I move that we don’t stop here!” urged Joe; “let us go up, master, let us go up higher by all means.”

“All the more willingly, Joe, that there is Mount Duthumi right ahead of us. If my calculations be right we shall have passed it before seven o’clock in the evening.”

“Shall we not travel at night?” asked the Scotchman.

“No, as little as possible. With care and vigilance we might do so safely, but it is not enough to sweep across Africa. We want to see it.”

“Up to this time we have nothing to complain of, master. The best cultivated and most fertile country in the world instead of a desert! Believe the geographers after that!”

Let us wait, Joe! we shall see by-and-by.”

About half-past six in the evening the Victoria was directly opposite Mount Duthumi; in order to pass, it had to ascend to a height of more than three thousand feet, and to accomplish that the doctor had only to raise the temperature of his gas eighteen degrees. It might have been correctly said that he held his balloon in his hand. Kennedy had only to indicate to him the obstacles to be surmounted, and the Victoria sped through the air, skimming the summits of the range.

At eight o’clock it descended the farther slope, the acclivity of which was much less abrupt. The anchors were thrown out from the car and one of them, coming in contact with the branches of an enormous nopal, caught on it firmly. Joe at once let himself slide down the rope and secured it. The silk ladder was then lowered to him and he remounted to the car with agility. The balloon now remained perfectly at rest sheltered from the eastern winds.

The evening meal was got ready, and the aeronauts, excited by their day’s journey, made a heavy onslaught upon the provisions.

“What distance have we traversed to-day?” asked Kennedy, disposing of some alarming mouthfuls.

The doctor took his bearings, by means of lunar observations, and consulted the excellent map that he had with him for his guidance. It belonged to the Atlas of “Der Neuester Endeckungen in Afrika” (“The Latest Discoveries in Africa”), published at Gotha by his learned friend Dr. Petermann, and by that savant sent to him. This Atlas was to serve the doctor on his whole journey; for it contained the itinerary of Burton and Speke to the great lakes; the Soudan, according to Dr. Barth; the Lower Senegal, according to Guillaume Lejean; and the Delta of the Niger, by Dr. Blaikie.

Ferguson had also provided himself with a work which combined in one compilation all the notions already acquired concerning the Nile. It was entitled “The Sources of the Nile; being a General Survey of the Basin of that River and of its Head-Stream, with the History of the Nilotic Discovery, by Charles Beke, D.D.”

He also had the excellent charts published in the “Bulletins of the Geographical Society of London;” and not a single point of the countries already discovered could, therefore, escape his notice.

Upon tracing on his maps, he found that his latitudinal route had been two degrees, or one hundred and twenty miles, to the westward.

Kennedy remarked that the route tended toward the south; but this direction was satisfactory to the doctor, who desired to reconnoitre the tracks of his predecessors as much as possible. It was agreed that the night should be divided into three watches, so that each of the party should take his turn in watching over the safety of the rest. The doctor took the watch commencing at nine o’clock; Kennedy, the one commencing at midnight; and Joe, the three o’clock morning watch.

So Kennedy and Joe, well wrapped in their blankets, stretched themselves at full length under the awning, and slept quietly; while Dr. Ferguson kept on the lookout.

CHAPTER THIRTEENTH.

Change of Weather.–Kennedy has the Fever.–The Doctor’s Medicine. –Travels on Land.–The Basin of Imenge.–Mount Rubeho.–Six Thousand Feet Elevation.–A Halt in the Daytime.

The night was calm. However, on Saturday morning, Kennedy, as he awoke, complained of lassitude and feverish chills. The weather was changing. The sky, covered with clouds, seemed to be laying in supplies for a fresh deluge. A gloomy region is that Zungomoro country, where it rains continually, excepting, perhaps, for a couple of weeks in the month of January.

A violent shower was not long in drenching our travellers. Below them, the roads, intersected by “nullahs,” a sort of instantaneous torrent, were soon rendered impracticable, entangled as they were, besides, with thorny thickets and gigantic lianas, or creeping vines. The sulphuretted hydrogen emanations, which Captain Burton mentions, could be distinctly smelt.

“According to his statement, and I think he’s right,” said the doctor, “one could readily believe that there is a corpse hidden behind every thicket.”

“An ugly country this!” sighed Joe; “and it seems to me that Mr. Kennedy is none the better for having passed the night in it.”

“To tell the truth, I have quite a high fever,” said the sportsman.

“There’s nothing remarkable about that, my dear Dick, for we are in one of the most unhealthy regions in Africa; but we shall not remain here long; so let’s be off.”

Thanks to a skilful manoeuvre achieved by Joe, the anchor was disengaged, and Joe reascended to the car by means of the ladder. The doctor vigorously dilated the gas, and the Victoria resumed her flight, driven along by a spanking breeze.

Only a few scattered huts could be seen through the pestilential mists; but the appearance of the country soon changed, for it often happens in Africa that some of the unhealthiest districts lie close beside others that are perfectly salubrious.

Kennedy was visibly suffering, and the fever was mastering his vigorous constitution.

“It won’t do to fall ill, though,” he grumbled; and so saying, he wrapped himself in a blanket, and lay down under the awning.

“A little patience, Dick, and you’ll soon get over this,” said the doctor.

“Get over it! Egad, Samuel, if you’ve any drug in your travelling-chest that will set me on my feet again, bring it without delay. I’ll swallow it with my eyes shut!”

“Oh, I can do better than that, friend Dick; for I can give you a febrifuge that won’t cost any thing.”

“And how will you do that?”

“Very easily. I am simply going to take you up above these clouds that are now deluging us, and remove you from this pestilential atmosphere. I ask for only ten minutes, in order to dilate the hydrogen.”

The ten minutes had scarcely elapsed ere the travellers were beyond the rainy belt of country.

“Wait a little, now, Dick, and you’ll begin to feel the effect of pure air and sunshine.”

“There’s a cure for you!” said Joe; “why, it’s wonderful!”

“No, it’s merely natural.”

“Oh! natural; yes, no doubt of that!”

“I bring Dick into good air, as the doctors do, every day, in Europe, or, as I would send a patient at Martinique to the Pitons, a lofty mountain on that island, to get clear of the yellow fever.”

“Ah! by Jove, this balloon is a paradise!” exclaimed Kennedy, feeling much better already.

“It leads to it, anyhow!” replied Joe, quite gravely.

It was a curious spectacle–that mass of clouds piled up, at the moment, away below them! The vapors rolled over each other, and mingled together in confused masses of superb brilliance, as they reflected the rays of the sun. The Victoria had attained an altitude of four thousand feet, and the thermometer indicated a certain diminution of temperature. The land below could no longer be seen. Fifty miles away to the westward, Mount Rubeho raised its sparkling crest, marking the limit of the Ugogo country in east longitude thirty-six degrees twenty minutes. The wind was blowing at the rate of twenty miles an hour, but the aeronauts felt nothing of this increased speed. They observed no jar, and had scarcely any sense of motion at all.

Three hours later, the doctor’s prediction was fully verified. Kennedy no longer felt a single shiver of the fever, but partook of some breakfast with an excellent appetite.

That beats sulphate of quinine!” said the energetic Scot, with hearty emphasis and much satisfaction.

“Positively,” said Joe, “this is where I’ll have to retire to when I get old!”

About ten o’clock in the morning the atmosphere cleared up, the clouds parted, and the country beneath could again be seen, the Victoria meanwhile rapidly descending. Dr. Ferguson was in search of a current that would carry him more to the northeast, and he found it about six hundred feet from the ground. The country was becoming more broken, and even mountainous. The Zungomoro district was fading out of sight in the east with the last cocoa-nut-trees of that latitude.

Ere long, the crests of a mountain-range assumed a more decided prominence. A few peaks rose here and there, and it became necessary to keep a sharp lookout for the pointed cones that seemed to spring up every moment.

“We’re right among the breakers!” said Kennedy.

“Keep cool, Dick. We shan’t touch them,” was the doctor’s quiet answer.

“It’s a jolly way to travel, anyhow!” said Joe, with his usual flow of spirits.

In fact, the doctor managed his balloon with wondrous dexterity.

“Now, if we had been compelled to go afoot over that drenched soil,” said he, “we should still be dragging along in a pestilential mire. Since our departure from Zanzibar, half our beasts of burden would have died with fatigue. We should be looking like ghosts ourselves, and despair would be seizing on our hearts. We should be in continual squabbles with our guides and porters, and completely exposed to their unbridled brutality. During the daytime, a damp, penetrating, unendurable humidity! At night, a cold frequently intolerable, and the stings of a kind of fly whose bite pierces the thickest cloth, and drives the victim crazy! All this, too, without saying any thing about wild beasts and ferocious native tribes!”

“I move that we don’t try it!” said Joe, in his droll way.

“I exaggerate nothing,” continued Ferguson, “for, upon reading the narratives of such travellers as have had the hardihood to venture into these regions, your eyes would fill with tears.”

About eleven o’clock they were passing over the basin of Imenge, and the tribes scattered over the adjacent hills were impotently menacing the Victoria with their weapons. Finally, she sped along as far as the last undulations of the country which precede Rubeho. These form the last and loftiest chain of the mountains of Usagara.

The aeronauts took careful and complete note of the orographic conformation of the country. The three ramifications mentioned, of which the Duthumi forms the first link, are separated by immense longitudinal plains. These elevated summits consist of rounded cones, between which the soil is bestrewn with erratic blocks of stone and gravelly bowlders. The most abrupt declivity of these mountains confronts the Zanzibar coast, but the western slopes are merely inclined planes. The depressions in the soil are covered with a black, rich loam, on which there is a vigorous vegetation. Various water-courses filter through, toward the east, and work their way onward to flow into the Kingani, in the midst of gigantic clumps of sycamore, tamarind, calabash, and palmyra trees.

“Attention!” said Dr. Ferguson. “We are approaching Rubeho, the name of which signifies, in the language of the country, the ‘Passage of the Winds,’ and we would do well to double its jagged pinnacles at a certain height. If my chart be exact, we are going to ascend to an elevation of five thousand feet.”

“Shall we often have occasion to reach those far upper belts of the atmosphere?”

“Very seldom: the height of the African mountains appears to be quite moderate compared with that of the European and Asiatic ranges; but, in any case, our good Victoria will find no difficulty in passing over them.”

In a very little while, the gas expanded under the action of the heat, and the balloon took a very decided ascensional movement. Besides, the dilation of the hydrogen involved no danger, and only three-fourths of the vast capacity of the balloon was filled when the barometer, by a depression of eight inches, announced an elevation of six thousand feet.

“Shall we go this high very long?” asked Joe.

“The atmosphere of the earth has a height of six thousand fathoms,” said the doctor; “and, with a very large balloon, one might go far. That is what Messrs. Brioschi and Gay-Lussac did; but then the blood burst from their mouths and ears. Respirable air was wanting. Some years ago, two fearless Frenchmen, Messrs. Barral and Bixio, also ventured into the very lofty regions; but their balloon burst–“

“And they fell?” asked Kennedy, abruptly.

“Certainly they did; but as learned men should always fall–namely, without hurting themselves.”

“Well, gentlemen,” said Joe, “you may try their fall over again, if you like; but, as for me, who am but a dolt, I prefer keeping at the medium height–neither too far up, nor too low down. It won’t do to be too ambitious.”

At the height of six thousand feet, the density of the atmosphere has already greatly diminished; sound is conveyed with difficulty, and the voice is not so easily heard. The view of objects becomes confused; the gaze no longer takes in any but large, quite ill-distinguishable masses; men and animals on the surface become absolutely invisible; the roads and rivers get to look like threads, and the lakes dwindle to ponds.

The doctor and his friends felt themselves in a very anomalous condition; an atmospheric current of extreme velocity was bearing them away beyond arid mountains, upon whose summits vast fields of snow surprised the gaze; while their convulsed appearance told of Titanic travail in the earliest epoch of the world’s existence.

The sun shone at the zenith, and his rays fell perpendicularly upon those lonely summits. The doctor took an accurate design of these mountains, which form four distinct ridges almost in a straight line, the northernmost being the longest.

The Victoria soon descended the slope opposite to the Rubeho, skirting an acclivity covered with woods, and dotted with trees of very deep-green foliage. Then came crests and ravines, in a sort of desert which preceded the Ugogo country; and lower down were yellow plains, parched and fissured by the intense heat, and, here and there, bestrewn with saline plants and brambly thickets.

Some underbrush, which, farther on, became forests, embellished the horizon. The doctor went nearer to the ground; the anchors were thrown out, and one of them soon caught in the boughs of a huge sycamore.

Joe, slipping nimbly down the tree, carefully attached the anchor, and the doctor left his cylinder at work to a certain degree in order to retain sufficient ascensional force in the balloon to keep it in the air. Meanwhile the wind had suddenly died away.

“Now,” said Ferguson, “take two guns, friend Dick– one for yourself and one for Joe–and both of you try to bring back some nice cuts of antelope-meat; they will make us a good dinner.”

“Off to the hunt!” exclaimed Kennedy, joyously.

He climbed briskly out of the car and descended. Joe had swung himself down from branch to branch, and was waiting for him below, stretching his limbs in the mean time.

“Don’t fly away without us, doctor!” shouted Joe.

“Never fear, my boy!–I am securely lashed. I’ll spend the time getting my notes into shape. A good hunt to you! but be careful. Besides, from my post here, I can observe the face of the country, and, at the least suspicious thing I notice, I’ll fire a signal-shot, and with that you must rally home.”

“Agreed!” said Kennedy; and off they went.

CHAPTER FOURTEENTH.

The Forest of Gum-Trees.–The Blue Antelope.–The Rallying-Signal. –An Unexpected Attack.–The Kanyeme.–A Night in the Open Air.–The Mabunguru.–Jihoue-la-Mkoa.–A Supply of Water.–Arrival at Kazeh.

The country, dry and parched as it was, consisting of a clayey soil that cracked open with the heat, seemed, indeed, a desert: here and there were a few traces of caravans; the bones of men and animals, that had been half-gnawed away, mouldering together in the same dust.

After half an hour’s walking, Dick and Joe plunged into a forest of gum-trees, their eyes alert on all sides, and their fingers on the trigger. There was no foreseeing what they might encounter. Without being a rifleman, Joe could handle fire-arms with no trifling dexterity.

“A walk does one good, Mr. Kennedy, but this isn’t the easiest ground in the world,” he said, kicking aside some fragments of quartz with which the soil was bestrewn.

Kennedy motioned to his companion to be silent and to halt. The present case compelled them to dispense with hunting-dogs, and, no matter what Joe’s agility might be, he could not be expected to have the scent of a setter or a greyhound.

A herd of a dozen antelopes were quenching their thirst in the bed of a torrent where some pools of water had lodged. The graceful creatures, snuffing danger in the breeze, seemed to be disturbed and uneasy. Their beautiful heads could be seen between every draught, raised in the air with quick and sudden motion as they sniffed the wind in the direction of our two hunters, with their flexible nostrils.

Kennedy stole around behind some clumps of shrubbery, while Joe remained motionless where he was. The former, at length, got within gunshot and fired.

The herd disappeared in the twinkling of an eye; one male antelope only, that was hit just behind the shoulder-joint, fell headlong to the ground, and Kennedy leaped toward his booty.

It was a blauwbok, a superb animal of a pale-bluish color shading upon the gray, but with the belly and the inside of the legs as white as the driven snow.

“A splendid shot!” exclaimed the hunter. “It’s a very rare species of the antelope, and I hope to be able to prepare his skin in such a way as to keep it.”

“Indeed!” said Joe, “do you think of doing that, Mr. Kennedy?”

“Why, certainly I do! Just see what a fine hide it is!”

“But Dr. Ferguson will never allow us to take such an extra weight!”

“You’re right, Joe. Still it is a pity to have to leave such a noble animal.”

“The whole of it? Oh, we won’t do that, sir; we’ll take all the good eatable parts of it, and, if you’ll let me, I’ll cut him up just as well as the chairman of the honorable corporation of butchers of the city of London could do.”

“As you please, my boy! But you know that in my hunter’s way I can just as easily skin and cut up a piece of game as kill it.”

“I’m sure of that, Mr. Kennedy. Well, then, you can build a fireplace with a few stones; there’s plenty of dry dead-wood, and I can make the hot coals tell in a few minutes.”

“Oh! that won’t take long,” said Kennedy, going to work on the fireplace, where he had a brisk flame crackling and sparkling in a minute or two.

Joe had cut some of the nicest steaks and the best parts of the tenderloin from the carcass of the antelope, and these were quickly transformed to the most savory of broils.

“There, those will tickle the doctor!” said Kennedy.

“Do you know what I was thinking about?” said Joe.

“Why, about the steaks you’re broiling, to be sure!” replied Dick.

“Not the least in the world. I was thinking what a figure we’d cut if we couldn’t find the balloon again.”

“By George, what an idea! Why, do you think the doctor would desert us?”

“No; but suppose his anchor were to slip!”

“Impossible! and, besides, the doctor would find no difficulty in coming down again with his balloon; he handles it at his ease.”

“But suppose the wind were to sweep it off, so that he couldn’t come back toward us?”

“Come, come, Joe! a truce to your suppositions; they’re any thing but pleasant.”

“Ah! sir, every thing that happens in this world is natural, of course; but, then, any thing may happen, and we ought to look out beforehand.”

At this moment the report of a gun rang out upon the air.

“What’s that?” exclaimed Joe.

“It’s my rifle, I know the ring of her!” said Kennedy.

“A signal!”

“Yes; danger for us!”

“For him, too, perhaps.”

“Let’s be off!”

And the hunters, having gathered up the product of their expedition, rapidly made their way back along the path that they had marked by breaking boughs and bushes when they came. The density of the underbrush prevented their seeing the balloon, although they could not be far from it.

A second shot was heard.

“We must hurry!” said Joe.

“There! a third report!”

“Why, it sounds to me as if he was defending himself against something.”

“Let us make haste!”

They now began to run at the top of their speed. When they reached the outskirts of the forest, they, at first glance, saw the balloon in its place and the doctor in the car.

“What’s the matter?” shouted Kennedy.

“Good God!” suddenly exclaimed Joe.

“What do you see?”

“Down there! look! a crowd of blacks surrounding the balloon!”

And, in fact, there, two miles from where they were, they saw some thirty wild natives close together, yelling, gesticulating, and cutting all kinds of antics at the foot of the sycamore. Some, climbing into the tree itself, were making their way to the topmost branches. The danger seemed pressing.

“My master is lost!” cried Joe.

“Come! a little more coolness, Joe, and let us see how we stand. We hold the lives of four of those villains in our hands. Forward, then!”

They had made a mile with headlong speed, when another report was heard from the car. The shot had, evidently, told upon a huge black demon, who had been hoisting himself up by the anchor-rope. A lifeless body fell from bough to bough, and hung about twenty feet from the ground, its arms and legs swaying to and fro in the air.

“Ha!” said Joe, halting, “what does that fellow hold by?”

“No matter what!” said Kennedy; “let us run! let us run!”

“Ah! Mr. Kennedy,” said Joe, again, in a roar of laughter, “by his tail! by his tail! it’s an ape! They’re all apes!”

“Well, they’re worse than men!” said Kennedy, as he dashed into the midst of the howling crowd.

It was, indeed, a troop of very formidable baboons of the dog-faced species. These creatures are brutal, ferocious, and horrible to look upon, with their dog-like muzzles and savage expression. However, a few shots scattered them, and the chattering horde scampered off, leaving several of their number on the ground.

In a moment Kennedy was on the ladder, and Joe, clambering up the branches, detached the anchor; the car then dipped to where he was, and he got into it without difficulty. A few minutes later, the Victoria slowly ascended and soared away to the eastward, wafted by a moderate wind.

“That was an attack for you!” said Joe.

“We thought you were surrounded by natives.”

“Well, fortunately, they were only apes,” said the doctor.

“At a distance there’s no great difference,” remarked Kennedy.

“Nor close at hand, either,” added Joe.

“Well, however that may be,” resumed Ferguson, “this attack of apes might have had the most serious consequences. Had the anchor yielded to their repeated efforts, who knows whither the wind would have carried me?”

“What did I tell you, Mr. Kennedy?”

“You were right, Joe; but, even right as you may have been, you were, at that moment, preparing some antelope-steaks, the very sight of which gave me a monstrous appetite.”

“I believe you!” said the doctor; “the flesh of the antelope is exquisite.”

“You may judge of that yourself, now, sir, for supper’s ready.”

“Upon my word as a sportsman, those venison-steaks have a gamy flavor that’s not to be sneezed at, I tell you.”

“Good!” said Joe, with his mouth full, “I could live on antelope all the days of my life; and all the better with a glass of grog to wash it down.”

So saying, the good fellow went to work to prepare a jorum of that fragrant beverage, and all hands tasted it with satisfaction.

“Every thing has gone well thus far,” said he.

“Very well indeed!” assented Kennedy.

“Come, now, Mr. Kennedy, are you sorry that you came with us?”

“I’d like to see anybody prevent my coming!”

It was now four o’clock in the afternoon. The Victoria had struck a more rapid current. The face of the country was gradually rising, and, ere long, the barometer indicated a height of fifteen hundred feet above the level of the sea. The doctor was, therefore, obliged to keep his balloon up by a quite considerable dilation of gas, and the cylinder was hard at work all the time.

Toward seven o’clock, the balloon was sailing over the basin of Kanyeme. The doctor immediately recognized that immense clearing, ten miles in extent, with its villages buried in the midst of baobab and calabash trees. It is the residence of one of the sultans of the Ugogo country, where civilization is, perhaps, the least backward. The natives there are less addicted to selling members of their own families, but still, men and animals all live together in round huts, without frames, that look like haystacks.

Beyond Kanyeme the soil becomes arid and stony, but in an hour’s journey, in a fertile dip of the soil, vegetation had resumed all its vigor at some distance from Mdaburu. The wind fell with the close of the day, and the atmosphere seemed to sleep. The doctor vainly sought for a current of air at different heights, and, at last, seeing this calm of all nature, he resolved to pass the night afloat, and, for greater safety, rose to the height of one thousand feet, where the balloon remained motionless. The night was magnificent, the heavens glittering with stars, and profoundly silent in the upper air.

Dick and Joe stretched themselves on their peaceful couch, and were soon sound asleep, the doctor keeping the first watch. At twelve o’clock the latter was relieved by Kennedy.