The doctor consulted his barometer, and at once discovered the cause of these symptoms.

"Are we descending?" asked Kennedy.

"Yes!" replied the doctor.

"The mischief!" thought Joe

In the lapse of fifteen minutes the Victoria was only one hundred and fifty feet above the ground; but the wind was much stronger than before.

The Talabas checked their horses, and soon a volley of musketry pealed out on the air.

"Too far, you fools!" bawled Joe. "I think it would be well to keep those scamps at a distance."

And, as he spoke, he aimed at one of the horsemen who was farthest to the front, and fired. The Talaba fell headlong, and, his companions halting for a moment, the balloon gained upon them.

"They are prudent!" said Kennedy.

"Because they think that they are certain to take us," replied the doctor; "and, they will succeed if we descend much farther. We must, absolutely, get higher into the air."

"What can we throw out?" asked Joe.

"All that remains of our stock of pemmican; that will be thirty pounds less weight to carry."

"Out it goes, sir!" said Joe, obeying orders.

The car, which was now almost touching the ground, rose again, amid the cries of the Talabas; but, half an hour later, the balloon was again falling rapidly, because the gas was escaping through the pores of the covering.

Ere long the car was once more grazing the soil, and Al-Hadji's black riders rushed toward it; but, as frequently happens in like cases, the balloon had scarcely touched the surface ere it rebounded, and only came down again a mile away.

"So we shall not escape!" said Kennedy, between his teeth.

"Throw out our reserved store of brandy, Joe," cried the doctor; "our instruments, and every thing that has any weight, even to our last anchor, because go they must!"

Joe flung out the barometers and thermometers, but all that amounted to little; and the balloon, which had risen for an instant, fell again toward the ground.

The Talabas flew toward it, and at length were not more than two hundred paces away.

"Throw out the two fowling-pieces!" shouted Ferguson.

"Not without discharging them, at least," responded the sportsman; and four shots in quick succession struck the thick of the advancing group of horsemen. Four Talabas fell, amid the frantic howls and imprecations of their comrades.

The Victoria ascended once more, and made some enormous leaps, like a huge gum-elastic ball, bounding and rebounding through the air. A strange sight it was to see these unfortunate men endeavoring to escape by those huge aerial strides, and seeming, like the giant Antaeus, to receive fresh strength every time they touched the earth. But this situation had to terminate. It was now nearly noon; the Victoria was getting empty and exhausted, and assuming a more and more elongated form every instant. Its outer covering was becoming flaccid, and floated loosely in the air, and the folds of the silk rustled and grated on each other.

"Heaven abandons us!" said Kennedy; "we have to fall!"

Joe made no answer. He kept looking intently at his master.

"No!" said the latter; "we have more than one hundred and fifty pounds yet to throw out."

"What can it be, then?" said Kennedy, thinking that the doctor must be going mad.

"The car!" was his reply; "we can cling to the network. There we can hang on in the meshes until we reach the river. Quick! quick!"

And these daring men did not hesitate a moment to avail themselves of this last desperate means of escape. They clutched the network, as the doctor directed, and Joe, holding on by one hand, with the other cut the cords that suspended the car; and the latter dropped to the ground just as the balloon was sinking for the last time.

"Hurrah! hurrah!" shouted the brave fellow exultingly, as the Victoria, once more relieved, shot up again to a height of three hundred feet.

The Talabas spurred their horses, which now came tearing on at a furious gallop; but the balloon, falling in with a much more favorable wind, shot ahead of them, and was rapidly carried toward a hill that stretched across the horizon to the westward. This was a circumstance favorable to the aeronauts, because they could rise over the hill, while Al-Hadji's horde had to diverge to the northward in order to pass this obstacle.

The three friends still clung to the network. They had been able to fasten it under their feet, where it had formed a sort of swinging pocket.

Suddenly, after they had crossed the hill, the doctor exclaimed: "The river! the river! the Senegal, my friends!"

And about two miles ahead of them, there was indeed the river rolling along its broad mass of water, while the farther bank, which was low and fertile, offered a sure refuge, and a place favorable for a descent.

"Another quarter of an hour," said Ferguson, "and we are saved!"

But it was not to happen thus; the empty balloon descended slowly upon a tract almost entirely bare of vegetation. It was made up of long slopes and stony plains, a few bushes and some coarse grass, scorched by the sun.

The Victoria touched the ground several times, and rose again, but her rebound was diminishing in height and length. At the last one, it caught by the upper part of the network in the lofty branches of a baobab, the only tree that stood there, solitary and alone, in the midst of the waste.

"It's all over," said Kennedy.

"And at a hundred paces only from the river!" groaned Joe.

The three hapless aeronauts descended to the ground, and the doctor drew his companions toward the Senegal.

At this point the river sent forth a prolonged roaring; and when Ferguson reached its bank, he recognized the falls of Gouina. But not a boat, not a living creature was to be seen. With a breadth of two thousand feet, the Senegal precipitates itself for a height of one hundred and fifty, with a thundering reverberation. It ran, where they saw it, from east to west, and the line of rocks that barred its course extended from north to south. In the midst of the falls, rocks of strange forms started up like huge ante-diluvian animals, petrified there amid the waters.

The impossibility of crossing this gulf was self-evident, and Kennedy could not restrain a gesture of despair.

But Dr. Ferguson, with an energetic accent of undaunted daring, exclaimed—

"All is not over!"

"I knew it," said Joe, with that confidence in his master which nothing could ever shake.

The sight of the dried-up grass had inspired the doctor with a bold idea. It was the last chance of escape. He led his friends quickly back to where they had left the covering of the balloon.

"We have at least an hour's start of those banditti," said he; "let us lose no time, my friends; gather a quantity of this dried grass; I want a hundred pounds of it, at least."

"For what purpose?" asked Kennedy, surprised.

"I have no more gas; well, I'll cross the river with hot air!"

"Ah, doctor," exclaimed Kennedy, "you are, indeed, a great man!"

Joe and Kennedy at once went to work, and soon had an immense pile of dried grass heaped up near the baobab.

In the mean time, the doctor had enlarged the orifice of the balloon by cutting it open at the lower end. He then was very careful to expel the last remnant of hydrogen through the valve, after which he heaped up a quantity of grass under the balloon, and set fire to it.

It takes but a little while to inflate a balloon with hot air. A head of one hundred and eighty degrees is sufficient to diminish the weight of the air it contains to the extent of one-half, by rarefying it. Thus, the Victoria quickly began to assume a more rounded form. There was no lack of grass; the fire was kept in full blast by the doctor's assiduous efforts, and the balloon grew fuller every instant.

It was then a quarter to four o'clock.

At this moment the band of Talabas reappeared about two miles to the northward, and the three friends could hear their cries, and the clatter of their horses galloping at full speed.

"In twenty minutes they will be here!" said Kennedy.

"More grass! more grass, Joe! In ten minutes we shall have her full of hot air."

"Here it is, doctor!"

The Victoria was now two-thirds inflated.

"Come, my friends, let us take hold of the network, as we did before."

"All right!" they answered together.

In about ten minutes a few jerking motions by the balloon indicated that it was disposed to start again. The Talabas were approaching. They were hardly five hundred paces away.

"Hold on fast!" cried Ferguson.

"Have no fear, master—have no fear!"

And the doctor, with his foot pushed another heap of grass upon the fire.

With this the balloon, now completely inflated by the increased temperature, moved away, sweeping the branches of the baobab in her flight.

"We're off!" shouted Joe.

A volley of musketry responded to his exclamation. A bullet even ploughed his shoulder; but Kennedy, leaning over, and discharging his rifle with one hand, brought another of the enemy to the ground.

Cries of fury exceeding all description hailed the departure of the balloon, which had at once ascended nearly eight hundred feet. A swift current caught and swept it along with the most alarming oscillations, while the intrepid doctor and his friends saw the gulf of the cataracts yawning below them.

Ten minutes later, and without having exchanged a word, they descended gradually toward the other bank of the river.

There, astonished, speechless, terrified, stood a group of men clad in the French uniform. Judge of their amazement when they saw the balloon rise from the right bank of the river. They had well-nigh taken it for some celestial phenomenon, but their officers, a lieutenant of marines and a naval ensign, having seen mention made of Dr. Ferguson's daring expedition, in the European papers, quickly explained the real state of the case.

The balloon, losing its inflation little by little, settled with the daring travellers still clinging to its network; but it was doubtful whether it would reach the land. At once some of the brave Frenchmen rushed into the water and caught the three aeronauts in their arms just as the Victoria fell at the distance of a few fathoms from the left bank of the Senegal.

"Dr. Ferguson!" exclaimed the lieutenant.

"The same, sir," replied the doctor, quietly, "and his two friends."

The Frenchmen escorted our travellers from the river, while the balloon, half-empty, and borne away by a swift current, sped on, to plunge, like a huge bubble, headlong with the waters of the Senegal, into the cataracts of Gouina.

"The poor Victoria!" was Joe's farewell remark.

The doctor could not restrain a tear, and extending his hands his two friends wrung them silently with that deep emotion which requires no spoken words.



CHAPTER FORTY-FOURTH.

Conclusion.—The Certificate.—The French Settlements.—The Post of Medina.—The Basilic.—Saint Louis.—The English Frigate.—The Return to London.

The expedition upon the bank of the river had been sent by the governor of Senegal. It consisted of two officers, Messrs. Dufraisse, lieutenant of marines, and Rodamel, naval ensign, and with these were a sergeant and seven soldiers. For two days they had been engaged in reconnoitring the most favorable situation for a post at Gouina, when they became witnesses of Dr. Ferguson's arrival.

The warm greetings and felicitations of which our travellers were the recipients may be imagined. The Frenchmen, and they alone, having had ocular proof of the accomplishment of the daring project, naturally became Dr. Ferguson's witnesses. Hence the doctor at once asked them to give their official testimony of his arrival at the cataracts of Gouina.

"You would have no objection to signing a certificate of the fact, would you?" he inquired of Lieutenant Dufraisse.

"At your orders!" the latter instantly replied.

The Englishmen were escorted to a provisional post established on the bank of the river, where they found the most assiduous attention, and every thing to supply their wants. And there the following certificate was drawn up in the terms in which it appears to-day, in the archives of the Royal Geographical Society of London:

"We, the undersigned, do hereby declare that, on the day herein mentioned, we witnessed the arrival of Dr. Ferguson and his two companions, Richard Kennedy and Joseph Wilson, clinging to the cordage and network of a balloon, and that the said balloon fell at a distance of a few paces from us into the river, and being swept away by the current was lost in the cataracts of Gouina. In testimony whereof, we have hereunto set our hands and seals beside those of the persons hereinabove named, for the information of all whom it may concern.

"Done at the Cataracts of Gouina, on the 24th of May, 1862. "(Signed), "SAMUEL FERGUSON "RICHARD KENNEDY, "JOSEPH WILSON, "DUFRAISSE, Lieutenant of Marines, "RODAMEL, Naval Ensign, "DUFAYS, Sergeant, "FLIPPEAU, MAYOR, } "PELISSIER, LOROIS, } Privates." RASCAGNET, GUIL- } LON, LEBEL, }

Here ended the astonishing journey of Dr. Ferguson and his brave companions, as vouched for by undeniable testimony; and they found themselves among friends in the midst of most hospitable tribes, whose relations with the French settlements are frequent and amicable.

They had arrived at Senegal on Saturday, the 24th of May, and on the 27th of the same month they reached the post of Medina, situated a little farther to the north, but on the river.

There the French officers received them with open arms, and lavished upon them all the resources of their hospitality. Thus aided, the doctor and his friends were enabled to embark almost immediately on the small steamer called the Basilic, which ran down to the mouth of the river.

Two weeks later, on the 10th of June, they arrived at Saint Louis, where the governor gave them a magnificent reception, and they recovered completely from their excitement and fatigue.

Besides, Joe said to every one who chose to listen:

That was a stupid trip of ours, after all, and I wouldn't advise any body who is greedy for excitement to undertake it. It gets very tiresome at the last, and if it hadn't been for the adventures on Lake Tchad and at the Senegal River, I do believe that we'd have died of yawning."

An English frigate was just about to sail, and the three travellers procured passage on board of her. On the 25th of June they arrived at Portsmouth, and on the next day at London.

We will not describe the reception they got from the Royal Geographical Society, nor the intense curiosity and consideration of which they became the objects. Kennedy set off, at once, for Edinburgh, with his famous rifle, for he was in haste to relieve the anxiety of his faithful old housekeeper.

The doctor and his devoted Joe remained the same men that we have known them, excepting that one change took place at their own suggestion.

They ceased to be master and servant, in order to become bosom friends.

The journals of all Europe were untiring in their praises of the bold explorers, and the Daily Telegraph struck off an edition of three hundred and seventy-seven thousand copies on the day when it published a sketch of the trip.

Doctor Ferguson, at a public meeting of the Royal Geographical Society, gave a recital of his journey through the air, and obtained for himself and his companions the golden medal set apart to reward the most remarkable exploring expedition of the year 1862.

—————

The first result of Dr. Ferguson's expedition was to establish, in the most precise manner, the facts and geographical surveys reported by Messrs. Barth, Burton, Speke, and others. Thanks to the still more recent expeditions of Messrs. Speke and Grant, De Heuglin and Muntzinger, who have been ascending to the sources of the Nile, and penetrating to the centre of Africa, we shall be enabled ere long to verify, in turn, the discoveries of Dr. Ferguson in that vast region comprised between the fourteenth and thirty-third degrees of east longitude.

THE END