The Classic Mystery Collection - Arthur Conan Doyle [4250]
"The robbery," said the reporter, "could only have been committed before the attack upon Mademoiselle Stangerson in her room. When the murderer entered the pavilion he already possessed the brass-headed key."
"That is impossible," said Monsieur Stangerson in a low voice.
"It is quite possible, Monsieur, as this proves."
And the young rascal drew a copy of the "Epoque" from his pocket, dated the 21st of October (I recall the fact that the crime was committed on the night between the 24th and 25th), and showing us an advertisement, he read:
"'Yesterday a black satin reticule was lost in the Grands Magasins de la Louvre. It contained, amongst other things, a small key with a brass head. A handsome reward will be given to the person who has found it. This person must write, poste restante, bureau 40, to this address: M. A. T. H. S. N.' Do not these letters suggest Mademoiselle Stangerson?" continued the reporter. "The 'key with a brass head'--is not this the key? I always read advertisements. In my business, as in yours, Monsieur, one should always read the personals.' They are often the keys to intrigues, that are not always brass-headed, but which are none the less interesting. This advertisement interested me specially; the woman of the key surrounded it with a kind of mystery. Evidently she valued the key, since she promised a big reward for its restoration! And I thought on these six letters: M. A. T. H. S. N. The first four at once pointed to a Christian name; evidently I said Math is Mathilde. But I could make nothing of the two last letters. So I threw the journal aside and occupied myself with other matters. Four days later, when the evening paper appeared with enormous head-lines announcing the murder of Mademoiselle Stangerson, the letters in the advertisement mechanically recurred to me. I had forgotten the two last letters, S. N. When I saw them again I could not help exclaiming, 'Stangerson!' I jumped into a cab and rushed into the bureau No. 40, asking: 'Have you a letter addressed to M. A. T. H. S. N.?' The clerk replied that he had not. I insisted, begged and entreated him to search. He wanted to know if I were playing a joke on him, and then told me that he had had a letter with the initials M. A. T. H. S. N, but he had given it up three days ago, to a lady who came for it. 'You come to-day to claim the letter, and the day before yesterday another gentleman claimed it! I've had enough of this,' he concluded angrily. I tried to question him 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 Surete.
"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