Once again the eminent detective is presented with a series of seemingly impenetrable cases: an anonymous but illustrious client employs him to rescue the daughter of a famous personage from the clutches of a roguish aristocrat and suspected murderer, a retired art-supply dealer asks him to investigate the suspicious disappearance of his wife with a neighbour and a stash of money, a veteran of the Boer War appeals to him to track down a missing friend, a man has become convinced that his wife ha ...