I share Maury’s opinion, and I was able to study the phenomenon in the very midst, where vessels rarely penetrate. Above us floated products of all kinds, heaped up among these brownish plants; trunks of trees torn from the Andes or the Rocky Mountains, and floated by the Amazon or the Mississippi; numerous wrecks, remains of keels, or ships’ bottoms, side-planks stove in, and so weighted with shells and barnacles that they could not again rise to the surface. And time will one day justify Maury’s other opinion, that these substances thus accumulated for ages will become petrified by the action of the water and will then form inexhaustible coal-mines—a precious reserve prepared by far-seeing Nature for the moment when men shall have exhausted the mines of continents. In the midst of this inextricable mass of plants and sea weed, I noticed some charming pink halcyons and actiniae, with their long tentacles trailing after them, and medusæ, green, red, and blue. All the day of the 22nd of February we passed in the Sargasso Sea, where such fish as are partial to marine plants find abundant nourishment. The next, the ocean had returned to its accustomed aspect. From this time for nineteen days, from the 23rd of February to the 12th of March, the _Nautilus_ kept in the middle of the Atlantic, carrying us at a constant speed of a hundred leagues in twenty-four hours. Captain Nemo evidently intended accomplishing his submarine programme, and I imagined that he intended, after doubling Cape Horn, to return to the Australian seas of the Pacific. Ned Land had cause for fear. In these large seas, void of islands, we could not attempt to leave the boat. Nor had we any means of opposing Captain Nemo’s will. Our only course was to submit; but what we could neither gain by force nor cunning, I liked to think might be obtained by persuasion. This voyage ended, would he not consent to restore our liberty, under an oath never to reveal his existence?—an oath of honour which we should have religiously kept. But we must consider that delicate question with the Captain. But was I free to claim this liberty? Had he not himself said from the beginning, in the firmest manner, that the secret of his life exacted from him our lasting imprisonment on board the _Nautilus?_ And would not my four months’ silence appear to him a tacit acceptance of our situation? And would not a return to the subject result in raising suspicions which might be hurtful to our projects, if at some future time a favourable opportunity offered to return to them?