* The Autobiography of a Lion King
* 1922 - The Riddle of the Sands
* 1923 - The Man from the Cape
* 1924 - The Yellow Snake
* 1925 - The House of Northcott
* 1926 - The Purple Cloud
* 1927 - The Secret Circle
* 1928 - The Red Circle
* 1929 - The Terror
* 1930 - The White Sphinx
* 1931 - The House of Borgia
* 1933 - The Dark Queen
* 1934 - Prince Jan, Striver
* 1935 - The Book of the Three Dragons
* 1936 - The Devil Rides Out
* 1941 - Old Brown's Daughter
* 1945 - The Fall of Gondar