A Cowboy Detective: A True Story Of Twenty-Two Years With a World Famous Detective Agency. E-book. Formato Mobipocket Charles A. Siringo   -  Arcadia Press, 2017  - 

Charles Angelo Siringo (1855-1928), was an American lawman, detective and agent for the Pinkerton National Detective Agency during the late 19th and early 20th centuries. This is his autobiography. He was a very interesting guy.