Perhaps the dogs were possessed of an uninterpreted longing to join their brothers of the wilderness in their care-free wanderings, and be forever free themselves from the yoke of sledge and whip and the toil and drudgery of the trail. But so like men were the beasts that they never had the courage to cast themselves free from the shackles of their man-master, though it required but a resolution and a plunge into the hills.