"You have helped me," said Poirot. "By showing me this room. By showing me what is in the room. By showing me what took place that evening. The impossible is never impossible! Remember that. I said that there were only two possibilities - I was wrong. There is a third possibility." He looked round the room again and gave a little shiver. "Pull back the curtains. Let in the light and the air. This room needs it. It needs cleansing. It will be a long time, I think, before it is purified from what afflicts it - the lingering memory of hate."
Burgess, his mouth open, handed Poirot his hat and coat. He seemed bewildered. Poirot, who enjoyed making incomprehensible statements, went down to the street with a brisk step.
When Poirot got home, he made a telephone call to Inspector Miller.
"What happened to Clayton's bag? His wife said he had packed one."
"It was at the club. He left it with the porter. Then he must have forgotten it and gone off without it."
"What was in it?"
"What you'd expect. Pyjamas, extra shirt, washing things."
"Very thorough."
"What did you expect would be in it?"
Poirot ignored that question. He said:
"About the stiletto. I suggest that you get hold of whatever cleaning woman attends Mrs. Spence's house. Find out if she ever saw anything like it lying about there."
"Mrs. Spence?" Miller whistled. "Is that the way your mind is working? The Spences were shown the stiletto. They didn't recognize it."
"Ask them again."
"Do you mean -"
"And then let me know what they say -"
"I can't imagine what you think you have got hold of."
"Read Othello, Miller. Consider the characters in Othello. We've missed out one of them."
He rang off. Next he dialed Lady Chatterton. The number was engaged.
He tried again a little later. Still no success. He called for George, his valet, and instructed him to continue ringing the number until he got a reply. Lady Chatterton, he knew, was an incorrigible telephoner.
He sat down in a chair, carefully eased off his patent leather shoes, stretched his toes, and leaned back.
"I am old," said Hercule Poirot. "I tire easily..." He brightened. "But the cells - they still function. Slowly - but they function. Othello, yes. Who was it said that to me? Ah yes, Mrs. Spence. The bag... the screen... the body, lying there like a man asleep. A clever murder. Premeditated, planned... I think, enjoyed!..."
George announced to him that Lady Chatterton was on the line.
"Hercule Poirot here, madame. May I speak to your guest?"
"Why, of course! Oh M. Poirot, have you done something wonderful?"
"Not yet," said Poirot. "But possibly, it marches."
Presently Margharita's voice - quiet, gentle.
"Madame, when I asked you if you noticed anything out of place that evening at the party, you frowned, as though you remembered something - and then it escaped you. Would it have been the position of the screen that night?"
"The screen? Why, of course, yes. It was not quite in its usual place."
"Did you dance that night?"
"Part of the time."
"Who did you dance with mostly?"
"Jeremy Spence. He's a wonderful dancer. Charles is good but not spectacular. He and Linda danced, and now and then we changed. Jock McLaren doesn't dance. He got out the records and sorted them and arranged what we'd have."
"You had serious music later?"
"Yes."
There was a pause. Then Margharita said:
"M. Poirot, what is - all this? Have you - is there - hope?"
"Do you ever know, madame, what the people around you are feeling?"
Her voice, faintly surprised, said:
"I - suppose so."
"I suppose not. I think you have no idea. I think that is the tragedy of your life. But the tragedy is for other people - not for you.
"Someone today mentioned to me Othello. I asked you if your husband was jealous, and you said you thought he must be. But you said it quite lightly. You said it as Desdemona might have said it, not realizing danger. She, too, recognized jealousy, but she did not understand it, because she herself never had, and never could, experience jealousy. She was, I think, quite unaware of the force of acute physical passion. She loved her husband with the romantic fervor of hero worship, she loved her friend Cassio, quite innocently, as a close companion. I think that because of her immunity to passion, she herself drove men mad. Am I making sense to you, madame?"
There was a pause - and then Margharita's voice answered. Cool, sweet, a little bewildered:
"I don't - I don't really understand what you are saying -"
Poirot sighed.
He spoke in matter-of-fact tones. "This evening," he said, "I pay you a visit."
Inspector Miller was not an easy man to persuade. But equally Hercule Poirot was not an easy man to shake off until he had got his way. Inspector Miller grumbled, but capitulated.
"- though what Lady Chatterton's got to do with this -"
"Nothing, really. She has provided asylum for a friend, that is all."
"About those Spences - how did you know?"