It Walks by Night - Henri Bencolin, Bk 1 Author:John Dickson Carr THE CUNNING OF MADNESS — Despite the attendance of Inspector Bencolin and his detectives, a ghastly and horrifying murder is committed under conditions that are impossible. "There are no secret entrances," Bencolin says, "the murderer was not hiding in the room, he did not go out by the window or either of the door... more »s, which were watched, but he was not there when we entered. And yet a murderer had beheaded his victim there!" And, as later events were to prove, Bencolin spoke the absolute truth!