- Jabez Wilson – Pawnshop owner, red-headed man, Holmes's client, and all-around dunce.
- John Clay (alias Vincent Spaulding) – Major criminal who has been posing as Wilson's assistant in order to dig a hole underneath the man's pawnshop so he can rob a local bank branch.
- Peter Jones – The police officer who comes to help nab John Clay in the act of robbing the Coburg branch of the City and Suburban Bank.
- Mr. Merryweather – Manager of the Coburg branch of the City and Suburban Bank.
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