‘I have seen many wonderful things done with weapons and knives at music halls,’ said Sir Henry. ‘I suppose it is possible that a man could have been concealed in the belt of trees, and that he might from there have thrown a knife or a dagger with sufficient accuracy—agreeing, of course, that he was a professional. I admit that that seems rather far-fetched, but it seems the only really feasible theory. You remember that the other man was distinctly under the impression that there was someone in the grove of trees watching him. As to Miss Mannering saying that Miss Ashley had a dagger in her hand and the others saying she hadn’t, that doesn’t surprise me. If you had had my experience you would know that five persons’ account of the same thing will differ so widely as to be almost incredible.’

Mr Petherick coughed.

‘But in all these theories we seem to be overlooking one essential fact,’ he remarked. ‘What became of the weapon? Miss Ashley could hardly get rid of a javelin standing as she was in the middle of an open space; and if a hidden murderer had thrown a dagger, then the dagger would still have been in the wound when the man was turned over. We must, I think, discard all far-fetched theories and confine ourselves to sober fact.’

‘And where does sober fact lead us?’

‘Well, one thing seems quite clear. No one was near the man when he was stricken down, so the only person who could have stabbed him was he himself. Suicide, in fact.’

‘But why on earth should he wish to commit suicide?’ asked Raymond West incredulously.

The lawyer coughed again. ‘Ah, that is a question of theory once more,’ he said. ‘At the moment I am not concerned with theories. It seems to me, excluding the supernatural in which I do not for one moment believe, that that was the only way things could have happened. He stabbed himself, and as he fell his arms flew out, wrenching the dagger from the wound and flinging it far into the zone of the trees. That is, I think, although somewhat unlikely, a possible happening.’

‘I don’t like to say, I am sure,’ said Miss Marple. ‘It all perplexes me very much indeed. But curious things do happen. At Lady Sharpley’s garden party last year the man who was arranging the clock golf tripped over one of the numbers—quite unconscious he was—and didn’t come round for about five minutes.’

‘Yes, dear Aunt,’ said Raymond gently, ‘but he wasn’t stabbed, was he?’

‘Of course not, dear,’ said Miss Marple. ‘That is what I am telling you. Of course there is only one way that poor Sir Richard could have been stabbed, but I do wish I knew what caused him to stumble in the first place. Of course, it might have been a tree root. He would be looking at the girl, of course, and when it is moonlight one does trip over things.’