Nevertheless, space was thenceforth but imperfectly lighted. Frequent mists came up and bounded our outlook to a few cable-lengths. Extreme watchfulness and caution were necessary to avoid collision with the floating masses of ice, which were travelling more slowly than the _Paracuta_. It is also to be noted that, on the southern side, the sky was frequently lighted up by the broad and brilliant rays of the polar aurora. The temperature fell very perceptibly, and no longer rose above twenty-three degrees. Forty-eight hours later Captain Len Guy and his brother succeeded with great difficulty in taking an approximate observation, with the following results of their calculations: Latitude: 75° 17' south. Latitude: 118° 3' east. At this date, therefore (12th March), the _Paracuta_ was distant from the waters of the Antarctic Circle only four hundred miles. During the night a thick fog came on, with a subsidence of the breeze. This was to be regretted, for it increased the risk of collision with the floating ice. Of course fog could not be a surprise to us, being where we were, but what did surprise us was the gradually increasing speed of our boat, although the falling of the wind ought to have lessened it. This increase of speed could not be due to the current for we were going more quickly than it. This state of things lasted until morning, without our being able to account for what was happening, when at about ten o'clock the mist began to disperse in the low zones. The coast on the west reappeared--a rocky coast, without a mountainous background; the _Paracuta_ was following its line. And then, no more than a quarter of a mile away, we beheld a huge mound, reared above the plain to a height of three hundred feet, with a circumference of from two to three hundred feet. In its strange form this great mound resembled an enormous sphinx; the body upright, the paws stretched out, crouching in the attitude of the winged monster which Grecian Mythology has placed upon the way to Thebes. Was this a living animal, a gigantic monster, a mastodon a thousand times the size of those enormous elephants of the polar seas whose remains are still found in the ice? In our frame of mind we might have believed that it was such a creature, and believed also that the mastodon was about to hurl itself on our little craft and crush it to atoms. After a few moments of unreasoning and unreasonable fright, we recognized that the strange object was only a great mound, singularly shaped, and that the mist had just rolled off its head, leaving it to stand out and confront us. Ah! that sphinx! I remembered, at sight of it, that on the night when the iceberg was overturned and the _Halbrane_ was carried away, I had dreamed of a fabulous animal of this kind, seated at the pole of the world, and from whom Edgar Poe could only wrest its secrets.