and one thousand more above the water-mark. The iceberg was then higher than at its borders—not a very reassuring fact. Several times that day the Nautilus tried again, and every time it struck the wall which lay like a ceiling above it. Sometimes the depth was but 600 yards, leaving only 200 to rise above the surface. Yet even this was twice the height it had been when the Nautilus had gone under the waves. I carefully noted the different depths, and thus obtained a submarine profile of the chain as it was developed under the water. That night no change had taken place in our situation. Still ice between four and five hundred yards in depth! It was evidently diminishing, but still what a thickness between us and the surface of the ocean! It was then eight. According to the daily custom on board the Nautilus, its air should have been renewed four hours ago; but I did not suffer much, although Captain Nemo had not yet made any demand upon his reserve of oxygen. My sleep was painful that night; hope and fear besieged me by turns; I rose several times. The groping of the Nautilus continued. About three in the morning, I noticed that the lower surface of the iceberg was only about fifty feet deep. One hundred and fifty feet now separated us from the surface of the waters. The iceberg was by degrees becoming an ice-field, the mountain a plain. My eyes never left the manometer. We were still rising diagonally to the surface, which sparkled under the electric rays. The iceberg was stretching both above and beneath into lengthening slopes; mile after mile it was getting thinner. At length, at six in the morning of that memorable day, the 19th of March, the door of the saloon opened, and Captain Nemo appeared.
"The sea is open!" was all he said.
CHAPTER XIV
THE SOUTH POLE
I rushed on to the platform. Yes! the open sea, with but a few scattered pieces of ice and moving icebergs—a long stretch of sea; a world of birds in the air, and myriads of fishes under those waters, which varied from intense blue to olive-green, according to the bottom. The ther-
