In the late nineteenth century, Brown's Park, a secluded valley astride the Utah-Colorado border, was a troubled land of deadly conflict among cattle barons, outlaws, rustlers, and small ranchers. Homesteader Elizabeth Bassett gained a tough reputation of her own, and her daughters followed suit, going on to become members of Butch Cassidy and the Wild Bunch's inner circle. Ann-who counted Cassidy among her lovers-became known as "queen of the...