Ehrich was on the premises one day in the summer of 1885 when a policeman came through the door escorting a fearsome-looking man in shackles. The man had just been found not guilty in a court hearing, but somehow the key had broken off in the lock of his handcuffs, “and judging from his language, which was ripe, he wasn’t happy about it.” Seizing the moment, the eleven-year-old produced a thumbnail-sized metal buttonhook from his pocket, worked it around inside the lock, and snapped open the cuffs within a minute.