"Age and size ain't got nothin' to do with it," Mack's daddy once said. "You gotta want to be a cowboy." Mack Hughes wanted to be a cowboy, all right, and he was just twelve years old when he went to work for the famous Hashknife spread in northern Arizona. Growing up on the range, Mack lived a life about which modern boys can only wonder. He spins yarns of bad horses and the men who rode them, tells of wild dogs that ravaged young calves, and recalls...