one to Bella Duveen; was it not highly probable that he had given the third one to Marthe Daubreuil? “So then, to sum up, there were four points of note against Marthe Daubreuil: “(1) Marthe Daubreuil could have overheard M. Renauld’s plans. “(2) Marthe Daubreuil had a direct interest in causing M. Renauld’s death. “(3) Marthe Daubreuil was the daughter of the notorious Madame Beroldy who in my opinion was morally and virtually the murderess of her husband, although it may have been Georges Conneau’s hand which struck the actual blow. “(4) Marthe Daubreuil was the only person, besides Jack Renauld, likely to have the third dagger in her possession.” Poirot paused and cleared his throat. “Of course, when I learned of the existence of the other girl, Bella Duveen, I realized that it was quite possible that _she___ might have killed M. Renauld. The solution did not commend itself to me, because, as I pointed out to you, Hastings, an expert, such as I am, likes to meet a foeman worthy of his steel. Still one must take crimes as one finds them, not as one would like them to be. It did not seem very likely that Bella Duveen would be wandering about carrying a souvenir paper-knife in her hand, but of course she might have had some idea all the time of revenging herself on Jack Renauld. When she actually came forward and confessed to the murder, it seemed that all was over. And yet—I was not satisfied, _mon ami___. _I was not satisfied.…___ “I went over the case again minutely, and I came to the same conclusion as before. If it was _not___ Bella Duveen, the only other person who could have committed the crime was Marthe Daubreuil. But I had not one single proof against her! “And then you showed me that letter from Mademoiselle Dulcie, and I saw a chance of settling the matter once for all. The original dagger was stolen by Dulcie Duveen and thrown into the sea—since, as she thought, it belonged to her sister. But if, by any chance, it was _not___ her sister’s, but the one given by Jack to Marthe Daubreuil—why then, Bella Duveen’s dagger would be still intact! I said no word to you, Hastings (it was no time for romance) but I sought out Mademoiselle Dulcie, told her as much as I deemed needful, and set her to search amongst the effects of her sister. Imagine my elation, when she sought me out (according to my instructions) as Miss Robinson with the precious souvenir in her possession!