as to the two persons who had already claimed the letter; but whether he wished to entrench himself behind professional secrecy,—he may have thought that he had already said too much,—or whether he was disgusted at the joke that had been played on him—he would not answer any of my questions.” Rouletabille paused. We all remained silent. Each drew his own conclusions from the strange story of the poste restante letter. It seemed, indeed, that we now had a thread by means of which we should be able to follow up this extraordinary mystery. “Then it is almost certain,” said Monsieur Stangerson, “that my daughter did lose the key, and that she did not tell me of it, wishing to spare any anxiety, and that she begged whoever had found it to write to the poste restante. She evidently feared that, by giving our address, inquiries would have resulted that would have apprised me of the loss of the key. It was quite logical, quite natural for her to have taken that course—for I have been robbed once before.” “Where was that, and when?” asked the Chief of the Sûreté. “Oh! many years ago, in America, in Philadelphia. There were stolen from my laboratory the drawings of two inventions that might have made the fortune of a man. Not only have I never learnt who the thief was, but I have never heard even a word of the object of the robbery, doubtless because, in order to defeat the plans of the person who had robbed me, I myself brought these two inventions before the public, and so rendered the robbery of no avail. From that time on I have been very careful to shut myself in when I am at work. The bars to these windows, the lonely situation of this pavilion, this cabinet, which I had specially constructed, this special lock, this unique key, all are precautions against fears inspired by a sad experience.” “Most interesting!” remarked Monsieur Dax. Monsieur Rouletabille asked about the reticule. Neither Monsieur Stangerson nor Daddy Jacques had seen it for several days, but a few hours later we learned from Mademoiselle Stangerson herself that the reticule had either been stolen from her, or she had lost it. She further corroborated all that had passed just as her father had stated. She had gone to the poste restante and, on the 23rd of October, had received a letter which, she affirmed, contained nothing but a vulgar pleasantry, which she had immediately burned. To return to our examination, or rather to our conversation. I must state that the Chief of the Sûreté, having inquired of Monsieur Stangerson under what conditions his daughter had gone to Paris on the 20th of October, we learned that Monsieur Robert Darzac had accompanied her, and Darzac had not been again seen at the château from that time to the day after the crime had been committed. The fact that Monsieur Darzac was with her in the Grands Magasins de la Louvre when the reticule disappeared, could not pass unnoticed, and, it must be said, strongly awakened our interest.