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The working title of the film was The Lion's Way. Larry "Buster" Crabbe, the 1932 Olympic gold medalist swimmer, made his starring debut in this film. A Hollywood Reporter news item noted that USC football player Orv Muller tested for the lead, and also noted that "Paramount's boot black, Oscar" was included among a cast of six hundred extras. Hollywood Reporter production charts credit Douglas Doty, Vincent Lawrence, Cyril Hume and Jules White with contributing to the screenplay, however, their contribution to the final film has not been determined. Although the film's pressbook and reviews list Robert Adair's character as "John C. Knolls," the name "James C. Knolls" is seen on a hunting certificate in the opening of the film. The pressbook noted that animal trainer Mabel Stark handled the "cats" and appeared in the film, and animal authority Jules White also assisted in the film. News items in Hollywood Reporter note that stampeding elephants injured several stunt men during production, and that Crabbe was bitten on the leg by a tiger, but did not suffer serious injury. Information in the Jack Mintz Collection at the AFI library indicates that some scenes were shot on location in Mexico, and in Chatsworth, Santa Catalina Island, San Pedro, Laguna and San Francisco, CA. According to modern sources, Max Baer was considered for the role of "Kaspa."