Holmes interrogates a survivor - a young girl who was apparently set free by her captor because she has a club foot - and arranges for her to "accidentally" see the footman that he suspects is the killer, despite his ironclad alibis. The girl identifies him as her kidnapper, but the thumbprint clears the suspect. Holmes then baits a trap for the killer: he uses the sister of a victim and has her perform in a classical tableau at an event attended by the King and Queen. Her Grecian-Roman costume is revealing, and her sandals expose her feet. After the performance, she walks away to be alone; the suspect drugs her and is quickly caught by Holmes and placed in custody. The sister returns home and is tucked into bed by her father.