The humorless local police officer who is first assigned to investigate the Diamond’s disappearance. By declaring that the thief must be inside the house and ruthlessly interrogating everyone present, he manages to alienate the family and servants enough to make his replacement Sergeant Cuff’s job much harder. His failure to uncover any real clues and marked contrast with the patient, insightful Cuff sets up a prominent trope in detective fiction: the celebrated higher-up detective coming in to replace the incompetent local officer.