The story takes place in London, the writer’s favorite city, where he placed the characters in most of his works. This story is not a detective story in the full sense of the word - it is about a crime, but we are not following an investigation, but a trial: as we remember, Fletcher studied law and was planning to become a barrister, so he wrote about legal proceedings with full knowledge of the matter. From the collection “The Golden Age of the British Detective.”