James Ryder
From The Arthur Conan Doyle Encyclopedia

Fictional character.
In the Sherlock Holmes stories
aka John Robinson (BLUE 393).
aka Jem (BLUE 492).
- With Catherine Cusack he stole the Blue Carbuncle from Countess of Morcar (BLUE 444).
- He was arrested by Sherlock Holmes by the detective let him go (BLUE 533).
