The Big Bow Mystery

East End landlady Mrs Drabdump is alarmed when she cannot rouse her lodger Arthur Constant. She summons the assistance of her neighbour, retired Scotland Yard detective George Grodman. He breaks down the door to Constant's room, only to find the man lying dead on his bed, with a deep cut to his throat. No-one, it seems, could have got in or out of the locked room and there is no sign of the m...