Hearne rejoined his comrades without opening his lips, and we had no further trouble about him. Towards six o'clock in the morning the fog cleared off, owing to a marked fall in the temperature. We had no longer to do with completely frozen vapour, but had to deal with the phenomenon called frost-rime, which often occurs in these high latitudes. Captain Len Guy recognized it by the quantity of prismatic threads, the point following the wind which roughened the light ice-crust deposited on the sides of the iceberg. Navigators know better than to confound this frost-rime with the hoar frost of the temperate zones, which only freezes when it has been deposited on the surface of the soil. We were now enabled to estimate the size of the solid mass on which we clustered like flies on a sugar-loaf, and the schooner, seen from below, looked no bigger than the yawl of a trading vessel. This iceberg of between three and four hundred fathoms in circumference measured from 130 to 140 feet high. According to all calculations, therefore, its depth would be four or five times greater, and it would consequently weigh millions of tons. This is what had happened: The iceberg, having been melted away at its base by contact with warmer waters, had risen little by little; its centre of gravity had become displaced, and its equilibrium could only be re-established by a sudden capsize, which had lifted up the part that had been underneath above the sea-level. The _Halbrane_, caught in this movement, was hoisted as by an enormous lever. Numbers of icebergs capsize thus on the polar seas, and form one of the greatest dangers to which approaching vessels are exposed. Our schooner was caught in a hollow on the west side of the iceberg. She listed to starboard with her stern raised and her bow lowered. We could not help thinking that the slightest shake would cause her to slide along the slope of the iceberg into the sea. The collision had been so violent as to stave in some of the planks of her hull. After the first collision, the galley situated before the fore-mast had broken its fastenings. The door between Captain Len Guy's and the mate's cabins was torn away from the hinges. The topmast and the top-gallant-mast had come down after the back-stays parted, and fresh fractures could plainly be seen as high as the cap of the masthead. Fragments of all kinds, yards, spars, a part of the sails, breakers, cases, hen-coops, were probably floating at the foot of the mass and drifting with it. The most alarming part of our situation was the fact that of the two boats belonging to the _Halbrane_, one had been stove in when we grounded, and the other, the larger of the two, was still hanging on by its tackles to the starboard davits. Before anything else was done this boat had to be put in a safe place, because it might prove our only means of escape.