"Naturally, sir. Four months later Princess Lemoine lost her wonderful pearl necklace while sitting in a box at the Grand Opera in Paris. This was one of the cleverest thefts that ever baffled the police, for the necklace was never recovered. We know, however, that Jack Andrews occupied the box next to that of the princess. A coincidence--perhaps. We now come to the robbery of the Countess Ahmberg, the third on the list. Jack Andrews was a guest at her house, as I have explained to you. No blame has ever attached to this youthful adventurer, yet my firm, always interested in the pearls they have sold, advised me to keep an eye on him when he returned to America. I did so.