Eleven stories of collies, as children's pets, farmers' steady helpers, trackers or slayers of vicious beasts, and companions of very different men and one story of a wolf as tame and devoted as a dog.

    The story opens with an outbreak of hostilities between the Jackson Whites (an inbred race of mountain folk) led by the giant, Tully Bemis, terror of the hills, and the peaceful folk of the valley.A treasure chest which dates back to the Revolutionary times is thought to be hidden somewhere in the hills. Tully Bemis long has searched for it in vain, and when he becomes suspicious that young Bruce Harden, a valley farmer, and his geologist friend are on the track of the lost treasure he takes desperate action.The real hero of the story, however, is Mars who at the command of his master performs one of the most amazing feats that ever a collie has been called upon to do.