- Story: "The Game of Light". NOTE: Filmed as The Live Wire (1925).
- Story: "A Whiff of Heliotrope". NOTE: Filmed as A Gentleman After Dark (1942), Forgotten Faces (1936), Forgotten Faces (1928), Heliotrope (1920).
- Story: "Here's How". NOTE: Filmed as The Mad Whirl (1925).
- (1928) Book: Wrote the foreword to "My Autobiography" by Benito Mussolini. NOTE: He was also the book's actual writer, although uncredited.
- (1922) Novel: "The Hands of Nara".
- (1924) k Novel: "Fresh Waters".
- (1916) Book: "Potential Russia".
- (1921) Book: "The Will to Believe".
- (1911) Novel: "Jim Hands".
- (1929) Book: "The Writing on the Wall: Who Shall Govern Us Next?".
- (1920) Novel: "The Vanishing Men".
- (1925) Book: "Battling the Criminal".
- (1921) Novel: "The Velvet Black".
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