In 1914, a young midwesterner quit his railroad job to crack the Hollywood motion picture boom. Impressed by his energy and honesty in his role as Lincoln, D.W. Griffith made him his assistant for Intolerance. Griffith then made Joe a director. He swiftly progressed to a preeminent position in the industry, directing some of the biggest Hollywood stars of the 1920's including Douglas Fairbanks, Fatty Arbuckle, and Rudolph Valentino. Versatility played an important role in Joe's rich creative life inside the studios. His understanding of the mechanics of motion-picture film led him to develop...