From the Pecos to the Powder;: A cowboy's autobiography, as told to Ramon F. Adams by Bob KennonHardcover; Fine; Dust Jacket Very Good; 251 pp., index, photographs, illustrations. A fine, tight, unmarked copy in a near fine bright clipped dust jacket. One of the last old time cowboys here tells his own story: his boyhood in Texas, wandering from ranch to ranch in the Southwest, the trek to Montana with a trail herd, and his life thereafter among the people and ranches of the area. His account is full of anecdotes, humorous or tragic, which