‘When did you give it to him, mademoiselle?’

‘Last night.’

‘Did he warn you to say that, mademoiselle?’

‘What do you mean?’ she asked angrily.

But Poirot did not answer. He strode out of the room and into the drawing room. Barling, Keene, and Marshall were there. He went straight up to them.

‘Messieurs,’ he said brusquely, ‘will you follow me to the study?’

He passed out into the hall and addressed Joan and Harry.

‘You, too, I pray of you. And will somebody request madame to come? I thank you. Ah! And here is the excellent Digby. Digby, a little question, a very important little question. Did Miss Cleves arrange some Michaelmas daisies before dinner?’

The butler looked bewildered.

‘Yes, sir, she did.’

‘You are sure?’

‘Quite sure, sir.’

‘Tre`s bien. Now–come, all of you.’

Inside the study he faced them.

‘I have asked you to come here for a reason. The case is over, the police have come and gone. They say Mr Lytcham Roche has shot himself. All is finished.’ He paused. ‘But I, Hercule Poirot, say that it is not finished.’

As startled eyes turned to him the door opened and Mrs Lytcham Roche floated into the room.

‘I was saying, madame, that this case is not finished. It is a matter of the psychology. Mr Lytcham Roche, he had the manie de grandeur, he was a king. Such a man does not kill himself. No, no, he may go mad, but he does not kill himself. Mr Lytcham Roche did not kill himself.’ He paused. ‘He was killed.’

‘Killed?’ Marshall gave a short laugh. ‘Alone in a room with the door and window locked?’

‘All the same,’ said Poirot stubbornly, ‘he was killed.’

‘And got up and locked the door or shut the window afterward, I suppose,’ said Diana cuttingly.

‘I will show you something,’ said Poirot, going to the window. He turned the handle of the French windows and then pulled gently.

‘See, they are open. Now I close them, but without turning the handle. Now the window is closed but not fastened. Now!’

He gave a short jarring blow and the handle turned, shooting the bolt down into its socket.

‘You see?’ said Poirot softly. ‘It is very loose, this mechanism. It could be done from outside quite easily.’

He turned, his manner grim.

‘When that shot was fired at twelve minutes past eight, there were four people in the hall. Four people have an alibi. Where were the other three? You, madame? In your room. You, Monsieur Barling. Were you, too, in your room?’

‘I was.’

‘And you, mademoiselle, were in the garden. So you have admitted.’

‘I don’t see–’ began Diana.

‘Wait.’ He turned to Mrs Lytcham Roche. ‘Tell me, madame, have you any idea of how your husband left his money?’