Silver Valley (1927) STO 23-20 Dorothy Dwan, Tom Mix STO 23-18 Dorothy Dwan with Tom Mix and Dorothy Dwan. Directed by Benjamin Stoloff. Fox. More Information on this film...                                      This work (Silver Valley (1927), by Fox), identified by Bruce Calvert, is free of known copyright restrictions. Books King Cowboy: Tom Mix and the Movies by Robert S. Birchard, p. 208. Last Modified July 17, 2005