On the following day, shortly before noon, a heavy floe, measuring some miles in length, came down towards the _Fury_, exciting the gravest apprehensions for her safety. In a few minutes it came in contact, at the rate of a mile and a half an hour, with a point of the land-ice, breaking it up with a tremendous roar, and forcing numberless immense masses, perhaps many tons in weight, to the height of fifty or sixty feet; whence they again rolled down on the inner or land side, and were quickly succeeded by a fresh supply. While they were compelled to remain passive spectators of this grand but terrific sight, being within five or six hundred yards of the point, the danger they incurred was twofold: first, lest the floe should swing in and serve the ship in the same unceremonious manner; and, secondly, lest its pressure should detach the land-ice to which they were secured, and cast them adrift at the mercy of the tides. Fortunately, neither of these terrible alternatives occurred, the floe remaining stationary for the rest of the tide, and setting off with the ebb when the tide soon afterwards turned. The reader must not imagine that an ice-field is a smooth and uniform plain, as level as an English meadow; it is, on the contrary, a rugged succession of hollows, and of protuberances called “hummocks,” interspersed with pools of water, and occasionally intersected by deep fissures. In many parts it can be compared only to a promiscuous accumulation of rocks closely packed together, and piled up over the extensive dreary space in great heaps and endless ridges, leaving scarcely a foot of level surface, and compelling the traveller to thread his way as best he can among the perplexing inequalities; sometimes mounting unavoidable obstructions to an elevation of ten, and again more than a hundred feet, above the general level. The interspaces between these closely accumulated ice-masses are filled up to some extent with drifted snow. Now, let the reader endeavour to form a definite idea of the scene presented by an ice-field. Let him watch the slow progress of the sledges as they wind through the labyrinth of broken ice-tables, the men and dogs pulling and pushing up their respective loads, as Napoleon’s soldiers may have done when drawing their artillery through the rugged Alpine passes, or Lord Napier’s heroes when they scaled the steep Abyssinian heights. He will see them clambering over the very summit of lofty ridges, where no gap occurs, and again descending on the other side, the sledge frequently toppling over a precipice, sometimes capsizing, and sometimes breaking. [Illustration: AMONG THE ICE-HUMMOCKS.]