"I was speedily awakened to reality by a sudden noise like the cracking of some mighty edifice of stone, or the bursting of several pieces of ordnance. Ere the sound of that noise had vibrated on the air, a succession of reports like the continued discharge of a heavy fire of musketry, interspersed with the occasional roar of cannon, followed quickly upon one another, for the space of perhaps two minutes; when, suddenly, my eye was arrested by the oscillation of a moderate-sized iceberg not far beneath my feet, in a line away from the hill I was upon; and the next moment it tottered, and with a sidelong inclination, cut its way into the bosom of the sea upon which it had before been reclining. Roar upon roar pealed in echoes from the mountain heights on every side: the wild seabird arose with fluttering wings and rapid flight as it proceeded to a quarter where its quiet would be less disturbed: the heretofore peaceful water presented the appearance of a troubled ocean after a fierce gale of wind; and, amid the varied sounds now heard, human voices from the boat came rising up on high in honest English--strangely striking on the ear--hailing to know if I had seen the 'turn,' and also whether I wanted them to join me. But an instant had not passed before the mighty mass of snow and ice which had so suddenly overturned, again presented itself above the water. This time, however, it bore a different shape. The conical and rotten surface that had been uppermost, when I had first noticed it, was gone, and a smooth, table-like plane, from which streamed numerous cascades and _jets d'eau_, was now visible. The former had sunk some hundred feet below, when the 'berg,' reversing itself, had been overturned by its extreme upper weight, and thus brought the bottom of it high above the level of the sea." Northward, and still northward: thicker and more continuous grew the ice-plains, while ever and anon a sound like the discharge of heavy artillery booming along the lonely seas, announced that one iceberg after another had burst amid this freezing arctic midsummer. They now found that they were approaching the great Pack, where their labors were properly to begin. Due preparations were made, by laying in order ice-anchors, claws, and axes, getting tow-ropes, warps, and tracking-belts in order for instant use, and INSTALLING THE CROW'S NEST.