Jefferson Hope's accomplice who came to claim the wedding ring

At my summons, instead of the man of violence whom we expected, a very old and wrinkled woman hobbled into the apartment. She appeared to be dazzled by the sudden blaze of light, and after dropping a curtsey, she stood blinking at us with her bleared eyes and fumbling in her pocket with nervous, shaky fingers.

“Old woman be damned!” said Sherlock Holmes, sharply. “We were the old women to be so taken in. It must have been a young man, and an active one, too, besides being an incomparable actor. The get-up was inimitable."