Desc: The Fighting Edge: Directed by Henry Lehrman. With Kenneth Harlan, Patsy Ruth Miller, David Kirby, Heinie Conklin. Juan de Dios O'Rourke (Kenneth Harlan), an American Secret Service, of Spanish-Irish descent, leads the cattle ranchers and border patrol in a fight to suppress a gang of cattle rustlers, who have been driving large herds north-to-south from Texas into Mexico, and smuggling illegal, no-passport Chinese aliens south-to-north from Mexico into Texas, operating from a rambling mansion on the Texas side of the border, aided by his sweetheart, a rancher's daughter, Phoebe Joyce (Patsy Ruth Miller)