Flash Gordon: The Deadly Ray From Mars 1966
Writer
Squadron of Doom 1949
Screenplay
Pardon My Gun 1942
Writer
Holt of the Secret Service 1941
Screenplay
The Medico of Painted Springs 1941
Writer
Deadwood Dick 1940
Screenplay
Scouts to the Rescue 1939
Screenplay
Mars Attacks the World 1938
Screenplay
Flaming Frontiers 1938
Screenplay
Flash Gordon's Trip to Mars 1938
Screenplay
Rocket Ship 1938
Original Story, Screenplay
Forbidden Valley 1938
Director, Screenplay
Tim Tyler's Luck 1937
Director, Story, Screenplay
Wild West Days 1937
Screenplay
Secret Agent X-9 1937
Screenplay
Ghost Patrol 1936
Screenplay
The Lost Jungle 1934
Writer
The Lost Jungle 1934
Supervising Editor, Screenplay
The Mystery Squadron 1933
Screenplay
The Wolf Dog 1933
Screenplay
Fighting With Kit Carson 1933
Screenplay
The Whispering Shadow 1933
Screenplay
The Three Musketeers 1933
Story
The Devil Horse 1932
Writer
The Hurricane Express 1932
Story
The Last of the Mohicans 1932
Screenplay
The Shadow of the Eagle 1932
Editor, Writer
The Lightning Warrior 1931
Screenplay
The Galloping Ghost 1931
Screenplay
The Vanishing Legion 1931
Screenplay, Editor
The Phantom of the West 1930
Story, Screenplay
The King of the Kongo 1929
Screenplay
The Red Sword 1929
Writer
The Fatal Warning 1929
Story
Hey Rube! 1928
Screenplay
Tropic Madness 1928
Writer
The Vanishing West 1928
Writer
Terror Mountain 1928
Writer
Marry the Girl 1928
Story
Vultures of the Sea 1928
Writer
Land of the Lawless 1927
Writer
Out of the West 1926
Writer
The Lodge in the Wilderness 1926
Writer
Don Dare Devil 1925
Screenplay
Greater Than a Crown 1925
Writer
The Sunset Trail 1924
Writer
Daring Chances 1924
Writer
The Measure of a Man 1924
Screenplay
The Western Wallop 1924
Screenplay
Alimony 1924
Adaptation, Screenplay
Daytime Wives 1923
Writer
Can a Woman Love Twice? 1923
Screenplay
While Paris Sleeps 1923
Writer
The Foolish Matrons 1921
Writer
King of the Wild 1931
Scenario Writer
The Lone Defender 1930
Editor
Stranded 1927
Title Designer
Western Pluck 1926
Scenario Writer
The Everlasting Whisper 1925
Scenario Writer
Itching Palms 1923
Adaptation
Desert Driven 1923
Adaptation
Lorna Doone 1922
Scenario Writer
Credits from TMDB.