James Horner

James McCarthy Horner is a skilled criminal operative and accomplice to the notorious John Clay in 'The Red-Headed League.' He works as a plumber's assistant, providing the cover story and manual labor necessary for the pair's ambitious plan to tunnel into the City and Suburban Bank vault. While less prominent than John Clay in the narrative, Horner's physical toll—evidenced by the wear on his knees from weeks of underground excavation—speaks to his dedication to the scheme. Though arrested when Sherlock Holmes and Dr. John Watson thwart the robbery attempt at night, Horner remains one of the 'coolest and most daring criminals' Sherlock Holmes has encountered, operating within a well-organized criminal underworld. His role in the conspiracy demonstrates how seemingly legitimate tradesmen can be recruited into sophisticated criminal enterprises.