- A scene in which a horse falls to its death from a cliff, and the subsequent public outcry, led to the American Humane Association (AHA) overseeing filmmaking through its new Film and TV Unit. Eventually they introduced the now-familiar AHA certification, "No animals were harmed in the making of this motion picture."
- Irving Cummings filled in as director from 14 October 1938 to 24 October 1938, when 'King, Henry' was bed-ridden from a swelling in his ear.
- The film shows both Jesse and Frank going off the cliff on horseback. In reality the stunt was performed once and shot with two cameras.
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