Cast & crew
The Engineer's Thumb (1923)
Directed by George Ridgwell Written by Geoffrey Malins, Arthur Conan Doyle, Patrick L. Mannock
Cast
| Bertram Burleigh | Hatcherley |
| Hubert Willis | Watson |
| Ward McAllister | Ferguson |
| Eille Norwood | Holmes |
| Mercy Hatton | Topless Girl |
Crew
| George Ridgwell | Director |
| Geoffrey Malins | Writer |
| Arthur Conan Doyle | Story |
| Patrick L. Mannock | Writer |