One of the most prolific film director in the history of American cinema, with estimates of his output in the 300+ range over a career that began in the silent era and lasted until the late 1950s. He directed industrial promotional one-reelers, two-reel training films and comedy shorts, TV series episodes, full-length features, TV series episodes that were padded into full-length features. He used a plethora of different names in addition to his own, and newly discovered credits--often shorts from the mid to late 1920s--are being added to his filmography to this day.
