Presently Ursula sat up and wiped her eyes.

Poirot shook his head.

"There, there, my dear," she said soothingly, "it will be all right. You'll see -- everything will be all right."

"You know what brought me to you tonight," went on the girl. "This --" She held out a crumpled piece of newspaper, and I recognized the paragraph that Poirot had had inserted.

"It must have been a terrible ordeal," I said.

For a moment or two the girl looked mutely at Poirot. Then, her reserve breaking down completely, she nodded her head once, and burst into an outburst of sobs.

"No, no, my child," said Poirot kindly. "We can all realize the strain of this last week."

"And then to find that you knew," continued Ursula. "How did you know? Was it Ralph who told you?"

Caroline pushed past me, and putting her arm round the girl, patted her on the shoulder.

"This is very Weak and silly of me," she said.

Buried under curiosity and scandal-mongering there is a lot of kindness in Caroline. For the moment, even the interest of Poirot's revelation was lost in the sight of the girl's distress.

The girl hesitated, looking at him doubtfully.

"You do not trust me," said Poirot gently. "Yet all the same you came here to find me, did you not? Why was that?"

"It says that Ralph has been arrested. So everything is useless. I need not pretend any longer."

"Because I don't believe that Ralph did it," said the girl in a very low voice. "And I think that you are clever, and will find out the truth. And also --"

"Newspaper paragraphs are not always true, mademoiselle," murmured Poirot, having the grace to look ashamed of himself. "All the same, I think you will do well to make a clean breast of things. The truth is what we need now."

"Yes?"

"I think you are kind." Poirot nodded his head several times.

"How well you understand," said Ursula.

"It is very good that -- yes, it is very good. Listen, I do in verity believe that this husband of yours is innocent -- but the affair marches badly. If I am to save him, I must know all there is to know -- even if it should seem to make the case against him blacker than before."

"You're not going to send me away, I hope," said Caroline, settling herself comfortably in an arm-chair. "What I want to know," she continued, "is why this child was masquerading as a parlourmaid?"

"So you will tell me the whole story, will you not? From the beginning."

"Masquerading?" I queried.

"That's what I said. Why did you do it, child? For a wager?"

And encouraged, she began the story which I reproduce here in my own words.

"For a living," said Ursula drily.

Ursula Bourne, it seemed, was one of a family of seven impoverished Irish gentlefolk. On the death of her father, most of the girls were cast out into the world to earn their own living. Ursula's eldest sister was married to Captain Folliott. It was she whom I had seen that Sunday, and the cause of her embarrassment was clear enough now. Detemined to earn her living and not attracted to the idea of being a nursery governess -- the one profession open to an untrained girl, Ursula preferred the job of parlourmaid. She scorned to label herself a "lady parlourmaid." She would be the real thing, her reference being supplied by her sister. At Fernly, despite an aloofness which, as has been seen, caused some comment, she was a success at her job -- quick, competent, and thorough.

But to people like Ralph Paton, turning over a new leaf is easier in theory than in practice. He hoped that his stepfather, whilst still in ignorance of the marriage, might be persuaded to pay his debts and put him on his feet again.

But the revelation of the amount of Ralph's liabilities merely enraged Roger Ackroyd, and he refused to do anything at all. Some months passed, and then Ralph was bidden once more to Fernly. Roger Ackroyd did not beat about the bush. It was the desire of his heart that Ralph should marry Flora, and he put the matter plainly before the young man.

"I enjoyed the work," she explained. "And I had plenty of time to myself." And then came her meeting with Ralph Paton, and the love affair which culminated in a secret marriage. Ralph had persuaded her into that, somewhat against her will. He had declared that his stepfather would not hear of his marrying a penniless girl. Better to be married secretly, and break the news to him at some later and more favourable minute.

And so the deed was done, and Ursula Bourne became Ursula Paton. Ralph had declared that he meant to pay off his debts, find a job, and then, when he was in a position to support her, and independent of his adopted father, they would break the news to him.

Then came the crucial moment when Roger Ackroyd, always high-handed, decided to announce the engagement. He said no word of his intention to Ralph -- only to Flora, and Flora, apathetic, raised no objection. On Ursula, the news fell like a bombshell. Summoned by her, Ralph came hurriedly down from town. They met in the wood, where part of their conversation was overheard by my sister. Ralph implored her to keep silent for a little while longer, Ursula was equally determined to have done with concealments. She would tell Mr Ackroyd the truth without any further delay. Husband and wife parted acrimoniously.

And here it was that the innate weakness of Ralph Paton showed itself. As always, he grasped at the easy, the immediate solution. As far as I could make out, neither Flora nor Ralph made any pretence of love. It was, on both sides, a business arrangement. Roger Ackroyd dictated his wishes -- they agreed to them. Flora accepted a chance of liberty, money, and an enlarged horizon, Ralph, of course, was playing a different game. But he was in a very awkward hole financially. He seized at the chance. His debts would be Paid. He could start again with a clean sheet. His was not a nature to envisage the future, but I gather that he saw vaguely the engagement with Flora being broken off after a decent interval had elapsed. Both Flora and he stipulated that it should be kept a secret for the present. He was anxious to conceal it from Ursula. He felt instinctively that her nature, strong and resolute, with an inherent distaste for duplicity, was not one to welcome such a course.

Ursula, steadfast in her purpose, sought an interview with Roger Ackroyd that very afternoon, and revealed the truth to him. Their interview was a stormy one -- it might have been even more stormy had not Roger Ackroyd been already obsessed with his own troubles. It was bad enough, however. Ackroyd was not the kind of man to forgive the deceit that had been practised upon him. His rancour was mainly directed to Ralph, but Ursula came in for her share, since he regarded her as a girl who had deliberately tried to "entrap" the adopted son of a very wealthy man. Unforgivable things were said on both sides.

That same evening Ursula met Ralph by appointment in the small summer-house, stealing out from the house by the side door in order to do so. Their interview was made up of reproaches on both sides. Ralph charged Ursula with having irretrievably ruined his prospects by her ill-timed revelation. Ursula reproached Ralph with his duplicity.

They parted at last. A little over half an hour later came the discovery of Roger Ackroyd's body. Since that night Ursula had neither seen nor heard from Ralph.

As the story unfolded itself, I realized more and more what a damning series of facts it was. Alive, Ackroyd could hardly have failed to alter his will -- I knew him well enough to realize that to do so would be his first thought. His death came in the nick of time for Ralph and Ursula Paton. Small wonder the girl had held her tongue, and played her part so consistently.

My meditations were interrupted. It was Poirot's voice speaking, and I knew from the gravity of his tone that he, too, was fully alive to the implications of the position.

"Mademoiselle, I must ask you one question, and you must answer it truthfully, for on it everything may hang: What time was it when you parted from Captain Ralph Paton in the summer-house? Now, take a little minute so that your answer may be very exact."

The girl gave a half laugh, bitter enough in all conscience.

"Do you think I haven't gone over that again and again in my own mind? It was just half-past nine when I went out to meet him. Major Blunt was walking up and down the terrace, so I had to go round through the bushes to avoid him. It must have been about twenty-seven minutes to ten when I reached the summer-house. Ralph was waiting for me. I was with him ten minutes -- not longer, for it was just a quarter to ten when I got back to the house."

"I did."

"Is there anyone who can prove that?"

I saw the reflection of that thought in Poirot's next question.

The girl had her face hidden in her hands.

"Leaving Ralph Paton in the summerhouse?"

"I went up to my room."

I saw now the insistence of her question the other day. If only Ackroyd could have been proved to have been killed before a quarter to ten, and not after.

"Mademoiselle, it is of no importance what I think. What did you do when you got back to the house?"

"Until about ten o'clock."

"Yes -- but you don't think --"

"Who left the summer-house first?"

Poirot finished the sentence for her.

"Nobody but a fool would think any such thing," said Caroline indignantly. She patted Ursula on the shoulder.

I saw the dawning horror in her eyes.

"And stayed there until when?"

"Prove? That I was in my room, you mean? Oh! no. But surely -- oh! I see, they might think -- they might think --"

"That it was you who entered by the window and stabbed Mr Ackroyd as he sat in his chair? Yes, they might think just that."

"Don't worry, my dear," she said. "M. Poirot doesn't think that really. As for that husband of yours, I don't think much of him, and I tell you so candidly. Running away and leaving you to face the music."

"Horrible," she was murmuring. "Horrible."

Caroline gave her a friendly shake.

But Ursula shook her head energetically.

"Oh, no," she cried. "It wasn't like that at all. Ralph would not run away on his own account. I see now. If he heard of his stepfather's murder, he might think himself that I had done it."

"He wouldn't think any such thing," said Caroline.

"Do him no harm," said Caroline. "Never worry about what you say to a man. They're so conceited that they never believe you mean it if it's unflattering."

"I was so cruel to him that night -- so hard and bitter. I wouldn't listen to what he was trying to say -- wouldn't believe that he really cared. I just stood there telling him what I thought of him, and saying the coldest, cruellest things that came into my mind -- trying my best to hurt him."

"When the murder was discovered and he didn't come forward, I was terribly upset. Just for a moment I wondered -- but then I knew he couldn't -- he couldn't… But I wished he would come forward and say openly that he'd had nothing to do with it. I knew that he was fond of Dr Sheppard, and I fancied that perhaps Dr Sheppard might know where he was hiding." She turned to me. "That's why I said what I did to you that day. I thought, if you knew where he was, you might pass on the message to him."

"I?" I exclaimed.

"Why should James know where he was?" demanded Caroline sharply.

"That is true enough," said Poirot.

Ursual went on nervously twisting and untwisting her hands.

"My dear child," I said, "I have not the least idea where Ralph Paton is at the present moment."

"But --" Ursula held out the newspaper cutting in a puzzled fashion.

"It was very unlikely, I know," admitted Ursula, "but Ralph had often spoken of Dr Sheppard, and I knew that he would be likely to consider him as his best friend in King's Abbot."

"Ah! that," said Poirot, slightly embarrassed; "a bagatelle, mademoiselle. A rien du tout. Not for a moment do I believe that Ralph Paton has been arrested."

"But then --" began the girl slowly.

"A pity! But how should you? Now, madame," he smiled at her, his head on one side, his forefinger wagging eloquently, "no questions. And do not torment yourself. Be of good courage, and place your faith in Hercule Poirot."

Ursula shook her head. "I can't remember."

Poirot went on quickly: "There is one thing I should like to know -- did Captain Paton wear shoes or boots that night?"