Riders of the Whistling Skull

Riders of the Whistling Skull is a 1937 Three Mesquiteers Western Bmovie of the weird western genre starring Bob Livingston, Ray Crash Corrigan, and ventriloquist Max Terhune with his dummy Elmer. It was directed by Mack V. Wright, produced by Nat Levine and released by Republic Pictures. The film is based on the 1934 novel by William Colt MacDonald.

Source: Wikipedia