A Son of the Sahara (1924)

As a boy, Raoul is reared by an Arab tribe. Years later, as a refined Europeanized gentleman, he falls in love with Barbara, an officer's daughter, who rejects him when she discovers his background. Affecting a raid, he captures her and then secretly buys her at a slave auction. When she is rescued by French troops, however, his ancestry is established and they find happiness together.