The Adventure of the Veiled Lodger

In "The Adventure of the Veiled Lodger," Sherlock Holmes is approached by Mrs. Merrilow, a landlady concerned about her mysterious tenant who never reveals her face and exhibits strange behavior, including night-time outbursts and a worsening health condition. The story, part of Sir Arthur Conan Doyle's The Case-Book of Sherlock Holmes, delves into the secrets surrounding Mrs. Ronder, the lodger, and her unsettling circumstances, prompting Holmes to investigate these unusual events.