The story of the mustang and the wild or feral horse, whether of Spanish or American ancestry, is recounted by Walker D. Wyman in this authoritative book, which has been called "the final word on the history of the horse on the western range." Among matters treated are theories as to the origin of the wild horse, its place in the history and economy of the Indian (the coming of the hose "was as important to him as the coming of steam to the white man"), the origin of the western pony and the palomino, and the disappearance of the mustang and the extermination of the western horse from the range.