"I said a possibility, Madame, that is all."

Something in his tone seemed to strike her. She raised herself on one elbow and regarded him piercingly.

"Can I do anything?" she asked.

"Yes," he nodded his head, "you can tell me, Lady Astwell, why you suspect Owen Trefusis."

"I have told you I know - that's all."

"Unfortunately that is not enough," said Poirot dryly. "Cast your mind back to the fatal evening, milady. Remember each detail, each tiny happening. What did you notice or observe about the secretary? I, Hercule Poirot, tell you there must have been something."

Lady Astwell shook her head.

"I hardly noticed him at all that evening," she said, "and I certainly was not thinking of him."

"Your mind was taken up by something else?"

"Yes."

"With your husband's animus against Miss Lily Margrave?"

"That's right," said Lady Astwell, nodding her head; "you seem to know all about it, M. Poirot."

"Me, I know everything," declared the little man with an absurdly grandiose air.

"I am fond of Lily, M. Poirot; you have seen that for yourself. Reuben began kicking up a rumpus about some reference or other of hers. Mind you, I don't say she hadn't cheated about it. She had. But, bless you, I have done many worse things than that in the old days. You have got to be up to all sorts of tricks to get around theatrical managers. There is nothing I wouldn't have written, or said, or done, in my time.

"Lily wanted this job, and she put in a lot of slick work that was not quite - well, quite the thing, you know. Men are so stupid about that sort of thing; Lily really might have been a bank clerk absconding with millions for the fuss he made about it. I was terribly worried all the evening, because, although I could usually get round Reuben in the end, he was terribly pigheaded at times, poor darling. So of course I hadn't time to go noticing secretaries, not that one does notice M. Trefusis much, anyway. He is just there and that's all there is to it."

"I have noticed that fact about M. Trefusis," said Poirot. "His is not a personality that stands forth, that shines, that hits you cr-r-rack."

"No," said Lady Astwell, "he is not like Victor."

"M. Victor Astwell is, I should say, explosive."

"That is a splendid word for him," said Lady Astwell. "He explodes all over the house, like one of those thingamy-jig firework things."

"A somewhat quick temper, I should imagine?" suggested Poirot.

"Oh, he's a perfect devil when roused," said Lady Astwell, "but bless you, I'm not afraid of him. All bark and no bite to Victor."

Poirot looked at the ceiling.

"And you can tell me nothing about the secretary that evening?" he murmured gently.

"I tell you, M. Poirot, I know. It's intuition. A woman's intuition -"

"Will not hang a man," said Poirot, "and what is more to the point, it will not save a man from being hanged. Lady Astwell, if you sincerely believe that M. Leverson is innocent, and that your suspicions of the secretary are well-founded, will you consent to a little experiment?"

"What kind of an experiment?" demanded Lady Astwell suspiciously.

"Will you permit yourself to be put into a condition of hypnosis?"

"Whatever for?"

Poirot leaned forward.

"If I were to tell you, Madame, that your intuition is based on certain facts recorded subconsciously, you would probably be skeptical. I will only say, then, that this experiment I propose may be of great importance to that unfortunate young man, Charles Leverson. You will not refuse?"

"Who is going to put me into a trance?" demanded Lady Astwell suspiciously. "You?"

"A friend of mine, Lady Astwell, arrives, if I mistake not, at this very minute. I hear the wheels of the car outside."

"Who is he?"

"A Doctor Cazalet of Harley Street."

"Is he - all right?" asked Lady Astwell apprehensively.

"He is not a quack, Madame, if that is what you mean. You can trust yourself in his hands quite safely."

"Well," said Lady Astwell with a sigh, "I think it is all bunk.u.m, but you can try if you like. n.o.body is going to say that I stood in your way."

"A thousand thanks, milady."

Poirot hurried from the room. In a few minutes he returned ushering in a cheerful, round-faced little man, with spectacles, who was very upsetting to Lady Astwell's conception of what a hypnotist should look like. Poirot introduced them.

"Well," said Lady Astwell good-humoredly, "how do we start this tomfoolery?"

"Quite simple, Lady Astwell, quite simple," said the little doctor. "Just lean back, so - that's right, that's right. No need to be uneasy."

"I am not in the least uneasy," said Lady Astwell. "I should like to see anyone hypnotizing me against my will."

Doctor Cazalet smiled broadly.

"Yes, but if you consent, it won't be against your will, will it?" he said cheerfully. "That's right. Turn off that other light, will you, M. Poirot? Just let yourself go to sleep, Lady Astwell."

He shifted his position a little.

"It's getting late. You are sleepy - very sleepy. Your eyelids are heavy, they are closing - closing - closing. Soon you will be asleep..."

His voice droned on, low, soothing, and monotonous. Presently he leaned forward and gently lifted Lady Astwell's right eyelid. Then he turned to Poirot, nodding in a satisfied manner.

"That's all right," he said in a low voice. "Shall I go ahead?"

"If you please."

The doctor spoke out sharply and authoritatively: "You are asleep, Lady Astwell, but you hear me, and you can answer my questions."

Without stirring or raising an eyelid, the motionless figure on the sofa replied in a low, monotonous voice: "I hear you. I can answer your questions."

"Lady Astwell, I want you to go back to the evening on which your husband was murdered. You remember that evening?"

"Yes."

"You are at the dinner table. Describe to me what you saw and felt."

The p.r.o.ne figure stirred a little restlessly.

"I am in great distress. I am worried about Lily."

"We know that; tell us what you saw."

"Victor is eating all the salted almonds; he is greedy. Tomorrow I shall tell Parsons not to put the dish on that side of the table."

"Go on. Lady Astwell."

"Reuben is in a bad humor tonight. I don't think it is altogether about Lily. It is something to do with business. Victor looks at him in a queer way."

"Tell us about Mr Trefusis, Lady Astwell."

"His left shirt cuff is frayed. He puts a lot of grease on his hair. I wish men didn't, it ruins the covers in the drawing-room."

Cazalet looked at Poirot; the other made a motion with his head.

"It is after dinner, Lady Astwell, you are having coffee. Describe the scene to me."

"The coffee is good tonight. It varies. Cook is very unreliable over her coffee. Lily keeps looking out of the window, I don't know why. Now, Reuben comes into the room; he is in one of his worst moods tonight, and bursts out with a perfect flood of abuse to poor Mr Trefusis. Mr Trefusis has his hand round the paper-knife, the big one with the sharp blade like a knife. How hard he is grasping it; his knuckles are quite white. Look, he has dug it so hard in the table that the point snaps. He holds it just as you would hold a dagger you were going to stick into someone. There, they have gone out together now. Lily has got her green evening dress on; she looks so pretty in green, just like a lily. I must have the covers cleaned next week."

"Just a minute, Lady Astwell."

The doctor leaned across to Poirot.

"We have got it, I think," he murmured; "that action with the paper-knife, that's what convinced her that the secretary did the thing."

"Let us go on to the Tower room now."

The doctor nodded, and began once more to question Lady Astwell in his high, decisive voice.

"It is later in the evening; you are in the Tower room with your husband. You and he have had a terrible scene together, have you not?"

Again the figure stirred uneasily.

"Yes - terrible - terrible. We said dreadful things - both of us."

"Never mind that now. You can see the room clearly, the curtains were drawn, the lights were on."

"Not the middle light, only the desk light."

"You are leaving your husband now, you are saying good night to him."

"No, I was too angry."

"It is the last time you will see him; very soon he will be murdered. Do you know who murdered him, Lady Astwell?"

"Yes. Mr Trefusis."

"Why do you say that?"

"Because of the bulge - the bulge in the curtain."

"There was a bulge in the curtain?"

"Yes."

"You saw it?"

"Yes. I almost touched it."

"Was there a man concealed there - Mr Trefusis?"

"Yes."

"How do you know?"

For the first time the monotonous answering voice hesitated and lost confidence.

"I - I - because of the paper-knife."

Poirot and the doctor again interchanged swift glances.

"I don't understand you, Lady Astwell. There was a bulge in the curtain, you say? Someone concealed there? You didn't see that person?"

"No."

"You thought it was Mr Trefusis because of the way he held the paper-knife earlier?"

"Yes."

"But Mr Trefusis had gone upstairs, had he not?"

"Yes - yes, that's right, he had gone upstairs."

"So he couldn't have been behind the curtain in the window?"

"No - no, of course not, he wasn't there."

"He had said good night to your husband some time before, hadn't he?"