Dr. Adolph Grundt
1 The Man with the Club Foot (1918)
2 The Return of Clubfoot (1923)
aka Island Gold
3 Clubfoot the Avenger (1924)
4 The Crouching Beast (1928)
5 The Gold Comfit Box (1932)
aka Mystery of the Gold Box Secret
6 The Spider's Touch (1936)
7 Courier to Marrakesh (1944)
2 The Return of Clubfoot (1923)
aka Island Gold
3 Clubfoot the Avenger (1924)
4 The Crouching Beast (1928)
5 The Gold Comfit Box (1932)
aka Mystery of the Gold Box Secret
6 The Spider's Touch (1936)
7 Courier to Marrakesh (1944)
