Wild Horse Range (1940)

Randall and his sidekick Manny (Frank Yaconelli) played horse traders battling a greedy and unscrupulous rival (Tom London). When some of his stock disappears, Jack follows the trail to a ranch belonging to Harriet Morgan (Marin Sais) and her young niece, Ann (Phyllis Ruth). A white stallion is accused of luring the Morgan mares astray but the horses are in reality being rustled by the ever-present London and his henchman (Charles King).