When something more than simple hard work is needed, when a little real method is needed, the police fail. Sometimes they stand too near the problem.

The strange thing here is that when an Italian, an Englishman, a Spaniard, and a Frenchman tried to tell what the voice was like, each one said it sounded like the voice of a foreigner. How strangely unusual that voice really must have been!

Let us now take ourselves again, in our thoughts, to the room where the murders were done.