- Novel: "The Top of the World" (filmed as The Top of the World (1925))
- Novel: "Bars of Iron" (filmed as Bars of Iron (1920))
- Novel: "The Hundredth Chance" (filmed as The Hundredth Chance (1920))
- Novel: "A Question of Trust" (filmed as A Question of Trust (1920))
- Novel: "The Woman of His Dream" (filmed as The Woman of His Dream (1921))
- Novel: "The Prey of the Dragon" (filmed as The Prey of the Dragon (1921))
- Novel: "The Place of Honour" (filmed as The Place of Honour (1921))
- (1921) Novel: "The Knave of Diamonds" (filmed as The Knave of Diamonds (1921))
- Novel: "Greatheart" (filmed as Greatheart (1921))
- Novel: "The Knight Errant" (filmed as The Knight Errant (1922))
- Novel: "The Experiment" (filmed as The Experiment (1922))
- Novel: "The Eleventh Hour" (filmed as The Eleventh Hour (1922))
- Novel: "A Debt of Honour" (filmed as A Debt of Honour (1922))
- Novel: "Lamp in the Desert" (filmed as Lamp in the Desert (1922))
- Novel (as "Delly"): "Mitzi" (filmed as The Rose of Paris (1924))
- Novel: "The Rocks of Valpre" (filmed as The Rocks of Valpre (1935), The Rocks of Valpre (1919))
- Novel: "The Black Knight" (filmed as The Black Knight (1977))
- (1918) Novel: "The Way of an Eagle" (filmed as The Way of an Eagle (1918))
- Novel: "The Safety Curtain" (filmed as The Safety Curtain (1918))
- Novel: "Keeper of the Door" (filmed as Keeper of the Door (1919))
- Novel: "The Swindler" (filmed as The Swindler (1919))
- Novel: "The Tidal Wave" (filmed as The Tidal Wave (1920))
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