But it was too late.  As they stood looking down upon it for an instant, the level floe, their one sustaining hope during all the day, suddenly cracked from side to side with the noise of ordnance.  Then the groaning and shrieking recommenced.  The crack immediately closed up, the pressure on the sides of the floe began again, and on the smooth surface of the ice, domes and mounds abruptly reared themselves.  As the pressure increased these domes and mounds cracked and burst into countless blocks and slabs.  Ridge after ridge was formed in the twinkling of an eye.  Thundering like a cannonade of siege guns, the whole floe burst up, jagged, splintered, hummocky.  In less than three minutes, and while the Freja’s men stood watching, the level stretch toward which since morning they had struggled with incalculable toil was ground up into a vast mass of confused and pathless rubble.

“Oh, this will never do,” muttered Ferriss, disheartened.

“Come on, men!” exclaimed Bennett.  “Mr. Ferriss, go forward, and choose a road for us.”

The labour of the morning was recommenced.  With infinite patience, infinite hardship, the sledges one by one were advanced.  So heavy were the three larger McClintocks that only one could be handled at a time, and that one taxed the combined efforts of men and dogs to the uttermost.  The same ground had to be covered seven times.  For every yard gained seven had to be travelled.  It was not a march, it was a battle; a battle without rest and without end and without mercy; a battle with an Enemy whose power was beyond all estimate and whose movements were not reducible to any known law.  A certain course would be mapped, certain plans formed, a certain objective determined, and before the course could be finished, the plans executed, or the objective point attained the perverse, inexplicable movement of the ice baffled their determination and set at naught their best ingenuity.

At four o’clock it began to snow.  Since the middle of the forenoon the horizon had been obscured by clouds and mist so that no observation for position could be taken.  Steadily the clouds had advanced, and by four o’clock the expedition found itself enveloped by wind and driving snow.  The flags could no longer be distinguished; thin and treacherous ice was concealed under drifts; the dogs floundered helplessly; the men could scarcely open their eyes against the wind and fine, powder-like snow, and at times when they came to drag forward the last sledge they found it so nearly buried in the snow that it must be dug out before it could be moved.

Toward half past five the odometer on one of the dog-sleds registered a distance of three-quarters of a mile made since morning.  Bennett called a halt, and camp was pitched in the lee of one of the larger hummocks.  The alcohol cooker was set going, and supper was had under the tent, the men eating as they lay in their sleeping-bags.  But even while eating they fell asleep, drooping lower and lower, finally collapsing upon the canvas floor of the tent, the food still in their mouths.