She put her finger to her lips. Her face was full of importance and excitement.

'Ursula Bourne,' she said, 'the parlourmaid from Fernly.

She's here! I've put her in the dining-room. She's in a terrible way, poor thing. Says she must see M. Poirot.' 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.

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

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

Presently Ursula sat up and wiped her eyes.

'This is very weak and silly of me,' she said.

'No, no, my child,' said Poirot kindly. 'We can all realize the strain of this last week.' 'It must have been a terrible ordeal,' I said.

'And then to find that you knew,' continued Ursula.

'How did you know? Was it Ralph who told you?' Poirot shook his head.

'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 says that Ralph has been arrested. So everything is useless. I need not pretend any longer.' '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.' 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?' '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 ' 'Yes?' 'I think you are kind.' Poirot nodded his head several times.

'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.' 'How well you understand,' said Ursula.

'So you will tell me the whole story, will you not? From the beginning.' '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?' 'Masquerading?' I queried.

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

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

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.

'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.

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.

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.

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.

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.