In Sherlock Holmes’s “The Adventure of the Yellow Face,” Grant Munro’s wife has the surname Munro.
Grant Munro comes to Baker Street because he is troubled by a mysterious figure with a yellow face seen at a nearby cottage. His wife, Effie, has behaved secretively, and Munro fears that her past is connected with the strange visitor. Holmes investigates but initially reaches the wrong conclusion.
The story is unusual because Holmes’s deduction fails. The apparent mystery is resolved through a family secret rather than a criminal conspiracy, and Holmes responds by emphasizing that a detective should remember the limits of inference. Doyle’s ending gives the case a notably sympathetic and domestic tone.
The story was first published in 1893 in The Strand Magazine. The title refers to the unsettling appearance seen at the cottage, not to a supernatural creature or a disguised version of Professor Moriarty.