A city boarding house and a tight-fisted old landlady with 'Jewish blood' murders one of her tenants for the 600 pounds in gold he had stolen from his employers, a building society. Her guilt is established with the help of a fellow boarder, of Detective Binge, and the victim's fiancee, an actress with whom he had planned to elope. Elements: apparent suicide, transient ghost; actress subsequently becomes a female detective officer in the force. (PB)