Sir Clinton Driffield Mystery
1. Murder In The Maze (1927)
2. Tragedy At Ravensthorpe (1927)
3. The Case With The Nine Solutions (1928)
4. Mystery At Lynden Sands (1928)
5. Grim Vengeance (1929)
     aka Nemesis At Raynham Parva
6. The Boat-house Riddle (1931)
7. The Sweepstake Murders (1931)
8. The Castleford Conundrum (1932)
9. The Brandon Case (1934)
     aka The Ha-ha Case
10. In Whose Dim Shadow (1935)
     aka The Tau Cross Mystery
11. A Minor Operation (1937)
12. For Murder Will Speak (1938)
13. Truth Comes Limping (1938)
14. The Twenty-one Clues (1941)
15. No Past Is Dead (1942)
16. Jack-in-the-box (1944)
17. Common Sense Is All You Need (1947)

Supt. Ross Mystery
1. The Eye In The Museum (1929)
2. The Two Tickets Puzzle (1930)

Death At Swaything Court (1926)
The Dangerfield Talisman (1926)
Gold Brick Island (1933)
     aka Tom Tiddler's Island
Murder Will Speak (1938)
The Counsellor (1939)
The Four Defences (1940)