Again: he will see the adventurous party, when baffled in their attempt to cross or find a pass, breaking a track with shovel and handspike; or, again, unable even with these appliances to accomplish their end, they retreat to seek an easier route. Perhaps they are fortunate enough to discover a kind of gap or gateway, and upon its winding and uneven surface accomplish a mile or so with comparative ease. The snow-drifts sometimes prove an assistance, but more frequently an obstruction; for though their surface is always hard, it is not always firm to the foot. Then the crust gives way, and the foot sinks at the very moment when the other is lifted. But, worse than this, the chasms between the hummocks may be overarched with snow in such a manner as to leave a considerable space at the bottom void and empty; then, when everything looks auspicious, down sinks one of the hapless explorers to his waist, another to the neck, a third is “lost to sight,” the sledge gives way, and all is confusion worse confounded! To educe order out of the chaos is probably the work of hours; especially if the sledge, as is often the case, must be unloaded. Not unfrequently it is necessary to carry the cargo in two or three loads; the sledges are coming and going continually; and the day is one “endless pull and haul.” Dr. Hayes speaks of an ice-floe, crested with hummocks, and covered with crusted snow, the solid contents of which lie estimated, in round numbers, at 6,000,000,000 of tons, its depth being about one hundred and sixty feet. All around its border was banked up a kind of rampart of last year’s ice, the loftiest pinnacle of which rose fully one hundred and twenty feet above the sea-level. This ice-tower consisted of blocks of ice of every shape and size, piled one upon another in the greatest disorder. Numerous other towers, or bastions, equally rugged, though of less elevation, sprang from the same ridge, and from every part of this desolate area; and “if a thousand Lisbons were crowded together and tumbled to pieces by the shock of an earthquake, the scene could hardly be more rugged, nor to cross the ruins a severer task.”