think. They are all convinced that my husband has gone off with some other woman. But he wasnât like that! All he thought of in life was his work. Half our quarrels came from that. He cared for it more than he did for me.â
âEnglishmen, they are like that,â said Poirot soothingly. âAnd if it is not work, it is the games, the sport. All those things they take au grand sérieux . Now, madame, recount to me exactly, in detail, and as methodically as you can, the exact circumstances of your husbandâs disappearance.â
âMy husband went to Paris on Thursday, the 20th of July. He was to meet and visit various people there connected with his work, amongst them Madame Olivier.â
Poirot nodded at the mention of the famous French womanchemist, who had eclipsed even Madame Curie in the brilliance of her achievements. She had been decorated by the French Government, and was one of the most prominent personalities of the day.
âHe arrived there in the evening and went at once to the Hotel Castiglione in the rue de Castiglione. On the following morning he had an appointment with Professor Bourgoneau, which he kept. His manner was normal and pleasant. The two men had a most interesting conversation, and it was arranged that he should witness some experiments in the professorâs laboratory on the following day. He lunched alone at the Café Royal, went for a walk in the Bois, and then visited Madame Olivier at her house at Passy. There, also, his manner was perfectly normal. He left about six. Where he dined is not known, probably alone at some restaurant. He returned to the hotel about eleven oâclock and went straight up to his room, after inquiring if any letters had come for him. On the following morning, he walked out of the hotel, and has not been seen again.â
âAt what time did he leave the hotel? At the hour when he would normally leave it to keep his appointment at Professor Bourgoneauâs laboratory?â
âWe do not know. He was not remarked leaving the hotel. But no petit déjeuner was served to him, which seems to indicate that he went out early.â
âOr he might, in fact, have gone out again after he came in the night before?â
âI do not think so. His bed had been slept in, and the night porter would have remembered anyone going out at that hour.â
âA very just observation, madame. We may take it, then, that he left early on the following morningâand that is reassuring from one point of view. He is not likely to have fallen a victim toany Apache assault at that hour. His baggage, now, was it all left behind?â
Mrs. Halliday seemed rather reluctant to answer, but at last she said:
âNoâhe must have taken one small suitcase with him.â
âHâm,â said Poirot thoughtfully, âI wonder where he was that evening. If we knew that, we should know a great deal. Whom did he meet?âthere lies the mystery. Madame, myself, I do not of necessity accept the view of the police; with them is it always âCherchez la femme.â Yet it is clear that something occurred that night to alter your husbandâs plans. You say he asked for letters on returning to the hotel. Did he receive any?â
âOne only, and that must have been the one I wrote him on the day he left England.â
Poirot remained sunk in thought for a full minute, then he rose briskly to his feet.
âWell, madame, the solution of the mystery lies in Paris, and to find it I myself journey to Paris on the instant.â
âIt is all a long time ago, monsieur.â
âYes, yes. Nevertheless, it is there that we must seek.â
He turned to leave the room, but paused with his hand on the door.
âTell me, madame, do you ever remember your husband mentioning the phrase, âThe Big Four?ââ
âThe Big Four,â she repeated thoughtfully. âNo, I canât say Ido.â
Six
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