The Three Mesquiteers (film)
The Three Mesquiteers is notable as the original entry in what became a 51film series of Western Three Mesquiteers Bmovies, eight of which starred John Wayne. Filmed in 1936, the film stars Bob Livingston in the role later played by Wayne, Ray Crash Corrigan, and Syd Saylor, and was directed by Ray Taylor.
Source: Wikipedia
