That day, the 24th of January, 1868, at noon, the second officer came to take the altitude of the sun. I mounted the platform, lit a cigar, and watched the operation. It seemed to me that the man did not understand French; for several times I made remarks in a loud voice, which must have drawn from him some involuntary sign of attention, if he had understood them; but he remained undisturbed and dumb.
As he was taking observations with the sextant, one of the sailors of the Nautilus (the strong man who had accompanied us on our first submarine excursion to the island of Crespo) came to clean the glasses of the lantern. I examined the fittings of the apparatus, the strength of which was increased a hundredfold by lenticular rings, placed similar to those in a lighthouse, and which projected their brilliance in a horizontal plane. The electric lamp was combined in such a way as to give its most powerful light. Indeed it was produced in vacuo, which insured both its steadiness and its intensity. This vacuum economized the graphite points, between which the luminous arc was developed—an important point of economy for Captain Nemo, who could not easily have replaced them; and under these conditions their waste was imperceptible. When the Nautilus was ready to continue its submarine journey, I went down to the saloon. The panels were closed and the course marked direct west.
We were furrowing the waters of the Indian Ocean, a vast liquid plain with a surface of 1,200,000,000 acres, and whose waters are so clear and transparent that anyone leaning over them would turn giddy. The Nautilus usually floated between fifty and a hundred fathoms deep. We went on so for some days. To anyone but myself, who had a great love for the sea, the hours would have seemed long and monotonous; but the daily walks on the platform, when I steeped myself in the reviving air of the ocean, the sight of the rich waters through the windows of the saloon, the books in the library, the compiling of my memoirs, took up all my time, and left me not a moment of ennui or weariness.
For some days we saw a great number of aquatic birds, sea-mews or gulls. Some were cleverly killed, and, prepared in a certain way, made very acceptable water game. Among large-winged birds, carried a long distance from all lands, and resting upon the waves from the fatigue of their flight, I saw some magnificent albatrosses, uttering discordant cries like the braying of an ass, and birds belonging to the family of the longipennates. The family of the totipalmates was represented by the sea-swallows, which caught the fish from the surface, and by numerous phaetons, or lepturi; among others, the phaeton with red lines, as large as a pigeon, whose white plumage, tinted with pink, shows off to advantage the blackness of its wings.
As to the fish, they always provoked our admiration when we surprised the secrets of their aquatic life through the open panels. I saw many kinds which I never before had a chance of observing.
I shall notice chiefly ostracions peculiar to the Red Sea, the Indian Ocean, and that part which washes the coast of tropical America. These fishes, like the tortoise, the armadillo, the sea hedgehog, and the crustacea, are protected by a breastplate which is neither chalky nor stony, but real bone. In some it takes the form of a solid triangle, in others of a solid quadrangle. Among the triangular I saw some an inch and a half in length, with wholesome flesh and a delicious flavor; they are brown at the tail and yellow at the fins, and I recommend their introduction into fresh water, to which a certain number of sea-fish easily accustom themselves. I would also mention quadrangular ostracions, having on the back four large tubercles; some dotted over with white spots on the lower part of the body, and which may be tamed like birds; trigons provided with spikes formed by the lengthening of their bony shell, and which from their strange gruntings are called “sea-pigs”; also dromedaries with large humps in the shape of a cone, whose flesh is very tough and leathery.