"That leaves a work-day of nineteen hours," Dan persisted. "Not any too little. Five hours it will be." He found where the snow had drifted against a great, dead log, leaving the white covering only a foot in depth on the lee side. He began to scrape the snow away, then hacked at the log with his ax until he had procured a piece of comparatively dry wood from its center. They all stood breathless while he lighted the little pile of kindling and heaped it with green wood,--the only wood procurable. But it didn't burn freely. It smoked fitfully, threatening to die out, and emitting very little heat. But they didn't particularly care. The sun was warm above, as always in the mountain winters of Southern Oregon. Snowbird and Dan cleared spaces beside the fire and slept. Lennox, who had rested on the journey, lay on his sled and with his uninjured arm tried to hack enough wood from the saplings that Dan had cut to keep the fire burning. At three they got up, still tired and aching in their bones from exposure. Twenty-four hours had passed since they had tasted food, and their unreplenished systems complained. There is no better engine in the wide world than the human body. It will stand more neglect and abuse than the finest steel motors ever made by the hands of European craftsmen. A man may fast many days if he lies quietly in one place and keeps warm. But fasting is a deadly proposition while pulling sledges over the snow. Dan was less hopeful now. His face told what his words did not. The lines cleft deeper about his lips and eyes; and Snowbird's heart ached when he tried to encourage her with a smile. It was a wan, strange smile that couldn't quite hide the first sickness of despair. The shadows quickly lengthened--simply leaping over the snow from the fast-falling sun. Soon it dropped down behind the ridge; and the gray of twilight began to deepen among the more distant trees. It blurred the outline and dulled the sight. With the twilight came the cold, first crisp, then bitter and penetrating to the vitals. The twilight deepened, the snow turned gray, and then, in a vague way, the journey began to partake of a quality of unreality. It was not that the cold and the snow and their hunger were not entirely real, or that the wilderness was no longer naked to their eyes. It was just that their whole effort seemed like some dreadful, emburdened journey in a dream,--a stumbling advance under difficulties too many and real to be true. The first sign was the far-off cry of the wolf pack. It was very faint, simply a stir in the ear drums, yet it was entirely clear. That clear, cold mountain air was a perfect telephone system, conveying a message distinctly, no matter how faintly. There were no tall buildings or cities to disturb the ether waves. And all three of them knew at the same instant it was not exactly the cry they had heard before.