The next day I related to Conseil and the Canadian the events of the night, which had excited my curiosity to the highest degree. My companions were not less surprised than myself.

“But where does he take his millions to?” asked Ned Land.

To that there was no possible answer. I returned to the saloon after having breakfast and set to work. Till five o’clock in the evening I employed myself in arranging my notes. At that moment—(ought I to attribute it to some peculiar idiosyncrasy)— I felt so great a heat that I was obliged to take off my coat. It was strange, for we were under low latitudes; and even then the Nautilus, submerged as it was, ought to experience no change of temperature. I looked at the manometer; it showed a depth of sixty feet, to which atmospheric heat could never attain.

I continued my work, but the temperature rose to such a pitch as to be intolerable.

“Could there be fire on board?” I asked myself.

I was leaving the saloon, when Captain Nemo entered; he approached the thermometer, consulted it, and, turning to me, said:

“Forty-two degrees.”

“I have noticed it, Captain,” I replied; “and if it gets much hotter we cannot bear it.”

“Oh, sir, it will not get better if we do do not wish it.”

“You can reduce it as you please, then?”

“No; but I can go farther from the stove which produces it.”

“It is outward, then!”

“Certainly; we are floating in a current of boiling water.”

“Is it possible!” I exclaimed.

“Look.”

The panels opened, and I saw the sea entirely white all round. A sulphurous smoke was curling amid the waves, which boiled like water in a copper. I placed my hand on one of the panes of glass, but the heat was so great that I quickly took it off again.

“Where are we?” I asked.

“Near the Island of Santorin, sir,” replied the Captain. “I wished to give you a sight of the curious spectacle of a submarine eruption.”

“I thought,” said I, “that the formation of these new islands was ended.”

“Nothing is ever ended in the volcanic parts of the sea,” replied Captain Nemo; “and the globe is always being worked by subterranean fires. Already, in the nineteenth year of our era, according to Cassiodorus and Pliny, a new island, Theia (the divine), appeared in the very place where these islets have recently been formed. Then they sank under the waves, to rise again in the year 69, when they again subsided. Since that time to our days the Plutonian work has been suspended. But on the 3rd of February, 1866, a new island, which they named George Island, emerged from the midst of the sulphurous vapour near Nea Kamenni, and settled again the 6th of the same month. Seven days after, the 13th of February, the Island of Aphroessa appeared, leaving between Nea Kamenni and itself a canal ten yards broad. I was in these seas when the phenomenon occurred, and I was able therefore to observe all the different phases. The Island of Aphroessa, of round form, measured 300 feet in diameter, and 30 feet in height. It was composed of black and vitreous lava, mixed with fragments of felspar. And lastly, on the 10th of March, a smaller island, called Reka, showed itself near Nea Kamenni, and since then these three have joined together, forming but one and the same island.”

“Perhaps so,” said Conseil; “but, in any case, the Nautilus can only contain a certain number of men. Could not you, sir, estimate their maximum?”

“How, Conseil?”

“By calculation; given the size of the vessel, which you know, sir, and consequently the quantity of air it contains, knowing also how much each man expends at a breath, and comparing these results with the fact that the Nautilus is obliged to go to the surface every twenty-four hours.”

Conseil had not finished the sentence before I saw what he was driving at.

“I understand,” said I; “but that calculation, though simple enough, can give but a very uncertain result.”

“Never mind,” said Ned Land urgently.

“Here it is, then,” said I. “In one hour each man consumes the oxygen contained in twenty gallons of air; and in twenty-four, that contained in 480 gallons. We must, therefore find how many times 480 gallons of air the Nautilus contains.”

“Just so,” said Conseil.

“Or,” I continued, “the size of the Nautilus being 1,500 tons; and one ton holding 200 gallons, it contains 300,000 gallons of air, which, divided by 480, gives a quotient of 625. Which means to say, strictly speaking, that the air contained in the Nautilus would suffice for 625 men for twenty-four hours.”

“Six hundred and twenty-five!” repeated Ned.

“But remember that all of us, passengers, sailors, and officers included, would not form a tenth part of that number.”

“Still too many for three men,” murmured Conseil.

The Canadian shook his head, passed his hand across his forehead, and left the room without answering.

“Will you allow me to make one observation, sir?” said Conseil. “Poor Ned is longing for everything that he can not have. His past life is always present to him; everything that we are forbidden he regrets. His head is full of old recollections. And we must understand him. What has he to do here? Nothing; he is not learned like you, sir; and has not the same taste for the beauties of the sea that we have. He would risk everything to be able to go once more into a tavern in his own country.”

Certainly the monotony on board must seem intolerable to the Canadian, accustomed as he was to a life of liberty and activity. Events were rare which could rouse him to any show of spirit; but that day an event did happen which recalled the bright days of the harpooner. About eleven in the morning, being on the surface of the ocean, the Nautilus fell in with a troop of whales—an encounter which did not astonish me, knowing that these creatures, hunted to death, had taken refuge in high latitudes.

We were seated on the platform, with a quiet sea. The month of October in those latitudes gave us some lovely autumnal days. It was the Canadian— he could not be mistaken—who signalled a whale on the eastern horizon. Looking attentively, one might see its black back rise and fall with the waves five miles from the Nautilus.