Garden City, Doubleday/Crime Club, 1929. First edition. A tap on Dr. Stoughton's shoulder was the fateful summons that immersed the doctor in his latest case--a tap by a policeman! As the doctor was led to the dead man, he knew intuitively that he was in for the strangest case of his career. Small bookseller's sticker to rear endpaper. Binding not tight, showing webbing at half-title page. $20.00.