Nevertheless, if I could see nothing of what was passing on board, I could hear the noises of the machinery. I had first the feeling that our craft, its bow slightly raised, lost contact with the earth. Some swerves and balancings in the air followed. Then the turbines underneath spun with prodigious rapidity, while the great wings beat with steady regularity.

Thus the "Terror," probably forever, had left the Great Eyrie, and launched into the air as a ship launches into the waters. Our captain soared above the double chain of the Alleghanies, and without doubt he would remain in the upper zones of the air until he had left all the mountain region behind.

But in what direction would he turn? Would he pass in flight across the plains of North Carolina, seeking the Atlantic Ocean? Or would he head to the west to reach the Pacific? Perhaps he would seek, to the south, the waters of the Gulf of Mexico. When day came how should I recognize which sea we were upon, if the horizon of water and sky encircled us on every side?

Several hours passed; and how long they seemed to me! I made no effort to find forgetfulness in sleep. Wild and incoherent thoughts assailed me. I felt myself swept over worlds of imagination, as I was swept through space, by an aerial monster. At the speed which the "Terror" possessed, whither might I not be carried during this interminable night? I recalled the unbelievable voyage of the "Albatross," of which the Weldon Institute had published an account, as described by Mr. Prudent and Mr. Evans. What Robur, the Conqueror, had done with his first airship, he could do even more readily with this quadruple machine.

At length the first rays of daylight brightened my cabin. Would I be permitted to go out now, to take my place upon the deck, as I had done upon Lake Erie?

I pushed upon the hatchway: it opened. I came half way out upon the deck.

All about was sky and sea. We floated in the air above an ocean, at a height which I judged to be about a thousand or twelve hundred feet. I could not see Robur, so he was probably in the engine room. Turner was at the helm, his companion on the look-out.

Now that I was upon the deck, I saw what I had not been able to see during our former nocturnal voyage, the action of those powerful wings which beat upon either side at the same time that the screws spun beneath the flanks of the machine.

By the position of the sun, as it slowly mounted from the horizon, I realized that we were advancing toward the south. Hence if this direction had not been changed during the night this was the Gulf of Mexico which lay beneath us.

A hot day was announced by the heavy livid clouds which clung to the horizon. These warnings of a coming storm did not escape the eye of Robur when toward eight o'clock he came on deck and took Turner's place at the helm. Perhaps the cloud-bank recalled to him the waterspout in which the "Albatross" had so nearly been destroyed, or the mighty cyclone from which he had escaped only as if by a miracle above the Antarctic Sea.

It is true that the forces of Nature which had been too strong for the "Albatross," might easily be evaded by this lighter and more versatile machine. It could abandon the sky where the elements were in battle and descend to the surface of the sea; and if the waves beat against it there too heavily, it could always find calm in the tranquil depths.

Doubtless, however, there were some signs by which Robur, who must be experienced in judging, decided that the storm would not burst until the next day.

He continued his flight; and in the afternoon, when we settled down upon the surface of the sea, there was not a sign of bad weather. The "Terror" is a sea bird, an albatross or frigate-bird, which can rest at will upon the waves! Only we have this advantage, that fatigue has never any hold upon this metal organism, driven by the inexhaustible electricity!

The whole vast ocean around us was empty. Not a sail nor a trail of smoke was visible even on the limits of the horizon. Hence our passage through the clouds had not been seen and signaled ahead.

The afternoon was not marked by any incident. The "Terror" advanced at easy speed. What her captain intended to do, I could not guess. If he continued in this direction, we should reach some one of the West Indies, or beyond that, at the end of the Gulf, the shore of Venezuela or Colombia. But when night came, perhaps we would again rise in the air to clear the mountainous barrier of Guatemala and Nicaragua, and take flight toward Island X, somewhere in the unknown regions of the Pacific.

Evening came. The sun sank in an horizon red as blood. The sea glistened around the "Terror," which seemed to raise a shower of sparks in its passage. There was a storm at hand. Evidently our captain thought so. Instead of being allowed to remain on deck, I was compelled to re-enter my cabin, and the hatchway was closed above me.

In a few moments from the noises that followed, I knew that the machine was about to be submerged. In fact, five minutes later, we were moving peacefully forward through the ocean's depths.

Thoroughly worn out, less by fatigue than by excitement and anxious thought, I fell into a profound sleep, natural this time and not provoked by any soporific drug. When I awoke, after a length of time which I could not reckon, the "Terror" had not yet returned to the surface of the sea.