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His western novel Whispering Smith – the title character of which was modeled on real-life Union Pacific Railroad detectives Timothy Keliher and Joe Lefors (though the name of the titular hero was apparently derived from another UPRR policeman, James L. "Whispering" Smith) – was made into a movie on eight separate occasions, four silent films in 1916, 1917, 1926, and 1927, with later versions in 1930, 1935, 1948 and 1952.