Zane Grey was primarily a novelist, but this is an account of his adventure with Buffalo Jones published in 1908. As the title suggests, this is the end of an era. Buffalo Jones was a real person, who at the end of his career set his skills as a hunter, killing wild beasts, to capturing them alive. This is the story of a trip into the Grand Canyon to capture not only a mountain lion alive, but numerous other wild beasts, which like the hunter made every effort to remain free.