diamonds and pearls become invisible.” 

 “Certainly not,” I replied, “but he should examine the lining of our hats and vests and everything we carry with us.” 

 Then, exhibiting my Kodak, a 9x12 with which I had been photographing her in various poses, I added: “In an apparatus no larger than that, a person could hide all of Lady Jerland’s jewels. He could pretend to take pictures and no one would suspect the game.” 

 “But I have heard it said that every thief leaves some clue behind him.” 

 “That may be generally true,” I replied, “but there is one exception: Arsène Lupin.” 

 “Why?” 

 “Because he concentrates his thoughts not only on the theft, but on all the circumstances connected with it that could serve as a clue to his identity.” 

 “A few days ago, you were more confident.” 

 “Yes, but since then I have seen him at work.” 

 “And what do you think about it now?” she asked. 

 “Well, in my opinion, we are wasting our time.” 

 And, as a matter of fact, the investigation had produced no result. But, in the meantime, the captain’s watch had been stolen. He was furious. He quickened his efforts and watched Rozaine more closely than before. But, on the following day, the watch was found in the second officer’s collar box. 

 This incident caused considerable astonishment, and displayed the humorous side of Arsène Lupin, burglar though he was, but dilettante as well. He combined business with pleasure. He reminded us of the author who almost died in a fit of laughter provoked by his own play. Certainly, he was an artist in his particular line of work, and whenever I saw Rozaine, gloomy and reserved, and thought of the double role that he was playing, I accorded him a certain measure of admiration. 

 On the following evening, the officer on deck duty heard groans emanating from the darkest corner of the ship. He approached and found a man lying there, his head enveloped in a thick gray scarf and his hands tied together with a heavy cord. It was Rozaine. He had been assaulted, thrown down and robbed. A card, pinned to 

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