Edna Ford shook her head.

‘Oh, no, I didn’t push Meriel – I didn’t have to. She fell into the pool. It was very convenient.’

Young Watson felt a pringling at the back of his neck. He wrote down what she had said.

‘Why did you drown Mabel Preston?’

‘That was rather a tiresome mistake. You see, she was wearing Adriana’s coat – the one with the big black and white squares and the emerald stripe. Such a noticeable pattern and not at all suitable at Adriana’s age – in fact at either of their ages. I do think elderly people should dress quietly – I am sure you agree about that. Anyhow, there was the coat, and of course I thought it was Adriana inside it. Very misleading of Mabel to put it on like that, and quite her own fault if it turned out as it did. I didn’t like her very much, but I’m sure I hadn’t the slightest desire to drown her. I just switched on my torch for a moment, saw that very noticeable pattern, and gave her one good push. After that, of course, I had to hold her down until she stopped struggling. But it really was quite easy. I am stronger than I look. You see, I used to play golf quite a lot and it develops the muscles.’

‘You say that it was your intention to drown Miss Adriana Ford?’

Edna gave a casual self-satisfied nod.

‘It seemed such a good opportunity,’ she said.

‘How did you come to be following Miss Preston?’

‘Oh, but I wasn’t. It was quite a surprise to me when she came through the gap in the hedge.’

‘Then why were you there?’

She primmed up her mouth.

‘Well, it is all rather delicate. You see, Mrs Trent was behaving so very badly about my husband – she really never left him alone. And when I saw them slip behind the curtains – the room was so hot and I had just opened a window – I thought I had better see where they had gone to, but that tiresome Mrs Felkins caught hold of me. Such a talker, and I couldn’t get away from her. And then there were two or three other people, so it was quite a time before I could go after Geoffrey and that woman. I guessed they would be in the summerhouse down by the pool, and so they were. But I think they heard me coming, because Geoffrey went off one way and she another. I didn’t know that Meriel had been there too, and that she had seen them. At least I don’t know whether she saw them, or whether she saw me, because I don’t know when she was there, but she tore her dress on the hedge, and she must have stained it too, because when I saw her again up at the house she had spilt coffee all down the front of it, and I thought, “Well, she wouldn’t do that for nothing”. I had a good close look at the dress, and under the coffee stain it was all wet with water and slime. So then I knew she had tried to move the body, because that was the only way she could have got herself stained like that. And do you know what I think? She didn’t give the alarm, so she must have thought it was Adriana who had fallen into the pool. And she must have thought it would be a pity if she was found too soon. Because of course she wanted to get her share of the money so as to be able to go on the stage.’

Ellie Page dropped her hands from her face and turned an incredulous gaze on Edna. It sounded as if she thought it was all quite a matter of course to push people out of your way, to push them out of life, because they had something you wanted. She thought, ‘She’s mad!’ And then, ‘But I was pushing for something I wanted too. How far would I have pushed her because I wanted Geoffrey?’ A bleak horror fell on her. Her hand went out gropingly. Miss Silver took it and held it in a firm, kind clasp.

The Superintendent was saying, ‘Why did you kill Meriel Ford?’

‘Well, I didn’t know how much she knew. As soon as I heard about her having left a shred of her dress on the hedge I knew she would be questioned about it, and I didn’t know what she might say. And the more I thought about those stains, the more I thought they might mean that she had seen me coming away from the pool. And then, night before last when I knew she had gone out after Geoffrey, I thought perhaps it would be better to get her out of the way anyhow. You see, I’m tired of people running after Geoffrey. And if Meriel had seen me by the pool she would have loved to make a scene about it. She was a very tiresome woman.’

‘So you killed her.’

She gave another of those casual nods.

‘I thought she would be just as well out of the way.’

The young detective wrote. Martin said,

‘Will you tell us how you set about it?’

She was still smiling.

‘It was quite easy. We went up to bed at half past nine, Adriana, Miss Silver, and I. I waited till they had gone into their rooms, and then I slipped down the back stairs. First of all I went to the study, just to make sure about Geoffrey. The glass door was unlatched, so I knew he hadn’t come in. I went to the cloakroom and fetched a niblick, and then I went out. I had just got to the corner of the house, when someone came by. I knew it was Meriel, because she was laughing to herself. She sounded as if she was angry and pleased at the same time. I couldn’t do anything about it then because there was someone else coming up behind her, so I had to let her go past. It seemed a pity, but it turned out all right in the end, because she didn’t go into the house. She just went straight on past the study door and round to the back. And then Geoffrey came by. He went as far as the study door and stood there. Then he gave a sort of groan and said, “Oh, my God! What’s the use!” and he went in, but he didn’t fasten the door, so I knew he was leaving it for Meriel. He must have seen her go on round the house and thought what was the good of going after her.’ She paused.

The Superintendent said,

‘Where were you when Mr Ford went into the house?’

‘I was just off the path behind a lilac bush. Do you know, I very nearly went after Geoffrey and missed what turned out to be such a good opportunity. I actually did go up the steps and into the room, but it was all dark and Geoffrey wasn’t there. He must have gone straight through and up to his room. So if Ellie was following him, that is when she must have gone past, because I didn’t see her and she didn’t see me – at least not then.’

‘Miss Page says she went past the study door after Mr Ford had gone in. She says she was watching Miss Meriel Ford on her way across the lawn when you came up from behind her.’

‘Yes, that’s right. Only I didn’t know she was there. She hadn’t any business to be there! I wanted to know what Meriel was doing, so I followed her. When she had gone in through the gate in the hedge I put on my torch, but I let it hang down in case there should be anyone looking out of a window. I was quite careful about that, and it is just a bit of bad luck that the buckle was coming off my shoe.’

‘Go on, Mrs Ford.’

‘It was all quite easy. I put the torch out before I came to the gate. I wanted to see what she was doing. She had gone through the inner hedge to the pool, and she had a light. I came up to the arch in the hedge and saw her go into the summerhouse. She had that handkerchief you picked up there afterwards. She held it in the light and laughed, and I could see that it was one of Esmé Trent’s. I don’t know anyone else who has bright yellow handkerchiefs – not what I should call in good taste – not at all. Meriel dropped the handkerchief and switched off her torch and came and stood by the pool. It was all very convenient. I only had to hit her once.’