‘Aunt Jane,’ she said. ‘Miss Marple, I mean, I believe—I do really believe you know the truth.’

‘Well, dear,’ said Miss Marple, ‘it is much easier for me sitting here quietly than it was for you—and being an artist you are so susceptible to atmosphere, aren’t you? Sitting here with one’s knitting, one just sees the facts. Bloodstains dropped on the pavement from the bathing dress hanging above, and being a red bathing dress, of course, the criminals themselves did not realize it was bloodstained. Poor thing, poor young thing!’

‘Excuse me, Miss Marple,’ said Sir Henry, ‘but you do know that I am entirely in the dark still. You and Miss Lemprière seem to know what you are talking about, but we men are still in utter darkness.’

‘I will tell you the end of the story now,’ said Joyce. ‘It was a year later. I was at a little east coast seaside resort, and I was sketching, when suddenly I had that queer feeling one has of something having happened before. There were two people, a man and a woman, on the pavement in front of me, and they were greeting a third person, a woman dressed in a scarlet poinsettia chintz dress. “Carol, by all that is wonderful! Fancy meeting you after all these years. You don’t know my wife? Joan, this is an old friend of mine, Miss Harding.”

‘I recognized the man at once. It was the same Denis I had seen at Rathole. The wife was different—that is, she was a Joan instead of a Margery; but she was the same type, young and rather dowdy and very inconspicuous. I thought for a minute I was going mad. They began to talk of going bathing. I will tell you what I did. I marched straight then and there to the police station. I thought they would probably think I was off my head, but I didn’t care. And as it happened everything was quite all right. There was a man from Scotland Yard there, and he had come down just about this very thing. It seems—oh, it’s horrible to talk about—that the police had got suspicions of Denis Dacre. That wasn’t his real name—he took different names on different occasions. He got to know girls, usually quiet inconspicuous girls without many relatives or friends, he married them and insured their lives for large sums and then—oh, it’s horrible! The woman called Carol was his real wife, and they always carried out the same plan. That is really how they came to catch him. The insurance companies became suspicious. He would come to some quiet seaside place with his new wife, then the other woman would turn up and they would all go bathing together. Then the wife would be murdered and Carol would put on her clothes and go back in the boat with him. Then they would leave the place, wherever it was, after inquiring for the supposed Carol and when they got outside the village Carol would hastily change back into her own flamboyant clothes and her vivid make-up and would go back there and drive off in her own car. They would find out which way the current was flowing and the supposed death would take place at the next bathing place along the coast that way. Carol would play the part of the wife and would go down to some lonely beach and would leave the wife’s clothes there by a rock and depart in her flowery chintz dress to wait quietly until her husband could rejoin her.