"The letter written to you."

Poirot smiled too.

"I see! Where Hercule Poirot is concerned - immediately the suspicion of murder arises!"

"Precisely," said the inspector dryly. "However, after your clearing up of the situation -"

Poirot interrupted him. "One little minute."

He turned to Mrs Farley. "Had your husband ever been hypnotized?"

"Never."

"Had he studied the question of hypnotism? Was he interested in the subject?"

She shook her head. "I don't think so."

Suddenly her self-control seemed to break down. "That horrible dream! It's uncanny! That he should have dreamed that - night after night - and then - and then - it's as though he were - hounded to death!"

Poirot remembered Benedict Farley saying - "I proceed to do that which I really wish to do. I put an end to myself."

He said, "Had it ever occurred to you that your husband might be tempted to do away with himself?"

"No - at least - sometimes he was very queer..."

Joanna Farley's voice broke in clear and scornful. "Father would never have killed himself. He was far too careful of himself."

Dr Stillingfleet said, "It isn't the people who threaten to commit suicide who usually do it, you know, Miss Farley. That's why suicides sometimes seem unaccountable."

Poirot rose to his feet. "Is it permitted," he asked, "that I see the room where the tragedy occurred?"

"Certainly. Dr Stillingfleet -"

The doctor accompanied Poirot upstairs. Benedict Farley's room was a much larger one than the secretary's next door. It was luxuriously furnished with deep leather-covered armchairs, a thick pile carpet, and a superb outsize writing-desk.

Poirot pa.s.sed behind the latter to where a dark stain on the carpet showed just before the window. He remembered the millionaire saying, "At twenty-eight minutes past three I open the second drawer down on the right of my desk, take out the revolver that I keep there, load it, and walk over to the window. And then - and then I shoot myself."

He nodded slowly. Then he said: "The window was open like this?"

"Yes. But n.o.body could have got in that way."

Poirot put his head out. There was no sill or parapet and no pipes near. Not even a cat could have gained access that way. Opposite rose the blank wall of the factory, a dead wall with no windows in it.

Stillingfleet said, "Funny room for a rich man to choose as his own sanctum with that outlook. It's like looking out on to a prison wall."

"Yes," said Poirot. He drew his head in and stared at the expanse of solid brick. "I think," he said, "that that wall is important."

Stillingfleet looked at him curiously. "You mean - psychologically?"

Poirot had moved to the desk. Idly, or so it seemed, he picked up a pair of what are usually called lazy-tongs. He pressed the handles; the tongs shot out to their full length. Delicately, Poirot picked up a burnt match stump with them from beside a chair some feet away and conveyed it carefully to the waste-paper basket.

"When you've finished playing with those things..." said Stillingfleet irritably.

Hercule Poirot murmured, "An ingenious invention," and replaced the tongs neatly on the writing-table. Then he asked: "Where were Mrs Farley and Miss Farley at the time of the - death?"

"Mrs Farley was resting in her room on the floor above this. Miss Farley was painting in her studio at the top of the house."

Hercule Poirot drummed idly with his fingers on the table for a minute or two. Then he said: "I should like to see Miss Farley. Do you think you could ask her to come here for a minute or two?"

"If you like."

Stillingfleet glanced at him curiously, then left the room. In another minute or two the door opened and Joanna Farley came in.

"You do not mind, mademoiselle, if I ask you a few questions?"

She returned his glance coolly. "Please ask anything you choose."

"Did you know that your father kept a revolver in his desk?"

"No."

"Where were you and your mother - that is to say your stepmother - that is right?"

"Yes, Louise is my father's second wife. She is only eight years older than I am. You were about to say -?"

"Where were you and she on Thursday of last week? That is to say, on Thursday night."

She reflected for a minute or two.

"Thursday? Let me see. Oh, yes, we had gone to the theater. To see Little Dog Laughed."

"Your father did not suggest accompanying you?"

"He never went out to theaters."

"What did he usually do in the evenings?"

"He sat in here and read."

"He was not a very sociable man?"

The girl looked at him directly. "My father," she said, "had a singularly unpleasant personality. No one who lived in close a.s.sociation with him could possibly be fond of him."

"That, mademoiselle, is a very candid statement."

"I am saving you time, M. Poirot. I realize quite well what you are getting at. My stepmother married my father for his money. I live here because I have no money to live elsewhere. There is a man I wish to marry - a poor man; my father saw to it that he lost his job. He wanted me, you see, to marry well - an easy matter since I was to be his heiress!"

"Your father's fortune pa.s.ses to you?"

"Yes. That is, he left Louise, my stepmother, a quarter of a million free of tax, and there are other legacies, but the residue goes to me." She smiled suddenly. "So you see, M. Poirot, I had every reason to desire my father's death!"

"I see, mademoiselle, that you have inherited your father's intelligence."

She said thoughtfully, "Father was clever... One felt that with him - that he had force - driving power - but it had all turned sour - bitter - there was no humanity left... "

Hercule Poirot said softly, "Grand Dieu, but what an imbecile I am..."

Joanna Farley turned towards the door. "Is there anything more?"

"Two little questions. These tongs here," he picked up the lazytongs, "were they always on the table?"

"Yes. Father used them for picking up things. He didn't like stooping."

"One other question. Was your father's eye-sight good?"

She stared at him.

"Oh, no - he couldn't see at all - I mean he couldn't see without his gla.s.ses. His sight had always been bad from a boy."

"But with his gla.s.ses?"

"Oh, he could see all right then, of course."

"He could read newspapers and fine print?"

"Oh, yes."

"That is all, mademoiselle."

She went out of the room.

Poirot murmured, "I was stupid. It was there, all the time, under my nose. And because it was so near I could not see it."

He leaned out of the window once more. Down below, in the narrow way between the house and the factory, he saw a small dark object.

Hercule Poirot nodded, satisfied, and went downstairs again.

The others were still in the library. Poirot addressed himself to the secretary: "I want you, Mr Cornworthy, to recount to me in detail the exact circ.u.mstances of Mr Farley's summons to me. When, for instance, did Mr Farley dictate that letter?"

"On Wednesday afternoon - at five-thirty, as far as I can remember."

"Were there any special directions about posting it?"

"He told me to post it myself."

"And you did so?"

"Yes."

"Did he give any special instructions to the butler about admitting me?"

"Yes. He told me to tell Holmes (Holmes is the butler) that a gentleman would be calling at 9:30. He was to ask the gentleman's name. He was also to ask to see the letter."

"Rather peculiar precautions to take, don't you think?"

Cornworthy shrugged his shoulders.

"Mr Farley," he said carefully, "was rather a peculiar man."

"Any other instructions?"

"Yes. He told me to take the evening off."

"Did you do so?"

"Yes, immediately after dinner I went to the cinema."

"When did you return?"

"I let myself in about a quarter past eleven."

"Did you see Mr Farley again that evening?"

"No."

"And he did not mention the matter the next morning?"

"No."

Poirot paused a moment, then resumed, "When I arrived I was not shown into Mr Farley's own room."

"No. He told me that I was to tell Holmes to show you into my room."

"Why was that? Do you know?"

Cornworthy shook his head. "I never questioned any of Mr Farley's orders," he said dryly. "He would have resented it if I had."

"Did he usually receive visitors in his own room?"

"Usually, but not always. Sometimes he saw them in my room."

"Was there any reason for that?"

Hugo Cornworthy considered.

"No - I hardly think so - I've never really thought about it."

Turning to Mrs Farley, Poirot asked: "You permit that I ring for your butler?"