crunch of the sled. But the sound only went a little way. Once in a long time distant trees cracked in the frost; and they all stood still a moment, trying to fight down the vain hope that this might be some hunter from the valleys who would come to their aid. A few times they heard the snow sliding, with the dull sound of rolling window shade, down from the overburdened limbs. The trees were inert with their load of snow.
As the dawn came out, they all stood still and listened to the wolf pack, singing on the ridge somewhere behind them. It was a large pack. They could n't make out individual voices,—neither the more shrill cry of the females, the yapping of the cubs, or the low, clear G-below-middle-C note of the males.
"If they should cross our tracks—" Lennox suggested.
"No use worrying about that now—not until we come to it," Dan told him.
The morning broke, the sun rose bright in a clear sky. But still they trudged on. In spite of the fact that the sled was heavy and broke through the snow crust as they tugged at it, they had made good time since their departure. But now every step was a pronounced effort. It was the dreadful beginning of fatigue that only food and warmth and rest could rectify.
