The snow shot through the opening, too, scattering the brands of fire in every direction. Had the shelter been anything else excepting the solid rock that it was, it must have been swept like chaff from its foundations.

The explosion, as it may be called, lasted but a minute or so. The boys hastily gathered up the scattered brands and flinging them together they were fanned by the tempest into a vigorous flame, whose warmth, slight as it was, was grateful beyond measure to the three gathered around it.

"Docak is wrong in regretting that we did not start last night," said Jack Cosgrove; "that style of storm is raging at this moment over hundreds of miles, and it would have made short work of us."

"What about the 'Nautilus,' if she is in it?"

"She can manage it if she has plenty of sea room, but I hope she is far enough off to dodge this blizzard. She ought to be at any rate."

The gale did the party an unexpected favor. It was a substantial one, too, which they appreciated. It drove the snow against the troublesome crevice with such fury that it quickly formed a solid bank, extending far above it. This ended the drifting of the particles inside and protected them from the cutting wind.

At the same time it did something of the same nature with the entrance, where it soon became banked to that extent that little blew within, and the gale hardly disturbed them.

Seeing what had taken place, Jack withdrew the bear-skin from where it had been stuffed into the opening and spread it in the farthermost corner of the cavern.

"Come, my hearties," said he, cheerfully, "we've got nothing to do but to make ourselves comfortable. We won't burn any more wood till Docak comes back."

They huddled together, and, though the cold made their teeth chatter and their bodies shiver, they found considerable relief and were willing to hope on.