The Secret of the Red Scarf
1934
The Strange Echo
1934
The Mystery of the Swaying Curtains
1935
The Shadow on the Door
1935
The Six Fingered Glove Mystery
1936
The Green Cameo Mystery
1936
The Secret at the Windmill
1937
Beneath the Crimson Brier Bush
1937
The Message in the Sand Dunes
1938
The Murmuring Portrait
1938
When the Key Turned
1939
In the Sunken Garden
1939
The Forbidden Tower
1940
The Sacred Feather
1940
The Lone Footprint
1941
The Double Disguise
1941
The Mansion of Secrets
1942
The Mysterious Neighbors
1942