Alden noted the play of the muscles between the shoulders, where they were not hidden by the bouncing quiver. The American Indian as a rule is deficient in muscular development, but this one showed several moderate ridges that doubled and shifted in response to the rhythmic swinging of his arms. Each was bent at the elbow with the hand close to the chest, like a professional runner, but the right hand was empty, while the fingers of the left were closed about the huge bow which he was obliged to hold diagonally before him, to prevent its interference with his running. The tousled head was pushed forward, and at intervals the redskin looked back. The glare of his black eyes through the meshes of flying hair suggested an owl peering from behind a thicket.