The Gray Wolf's Ghost (1919)

The unscrupulous attempts by speculators Dr. West and Jim Prince to have a railroad pass through lower California are met with opposition by Spanish landowners led by Dona Maria Saltonstall, who tries flirting with West to restore their property. Pereo, a religious fanatic who works for Dona Maria, believes in the curse of the Gray Wolf's Ghost: if a member of Dona Maria's family mates with an alien, fortune and life will be lost. Meanwhile, West's son Harry, whom he deserted years before, comes to avenge the wrong done to his mother. After West refuses to recognize Harry and publicly denounces him as a blackmailer, West is murdered and Prince, who wants the West fortune, accuses Harry. Harry is about to be hanged when the first train the lynchers have ever seen passes by. Pereo, thinking that the train is a god, confesses that he killed West and is dragged to death after lassoing the locomotive. Harry restores compromising letters to Dona Maria and receives her consent to marry her daughter Maruja.