myself,' said Miss Marple, 'because, of course, I don't know anything about drugs – nasty, dangerous things I call them. I have got an old recipe of my grandmother's for tansy tea that is worth any amount of your drugs. But I knew that there were several medical volumes in the house, and in one of them there was an index of drugs. You see, my idea was that Geoffrey had taken some particular poison, and was trying to say the name of it.
'Well, I looked down the list of H's, beginning He. Nothing there that sounded likely; then I began on the P's, and almost at once I came to – what do you think?'
She looked round, postponing her moment of triumph.
'Pilocarpine. Can't you understand a man who could hardly speak trying to drag that word out? What would that sound like to a cook who had never heard the word? Wouldn't it convey the impression "pile of carp"?'
'By Jove!' said Sir Henry.
'I should never have hit upon that,' said Dr Pender.
'Most interesting,' said Mr Petherick. 'Really most interesting.'
'I turned quickly to the page indicated in the index. I read about pilocarpine and its effect on the eyes and other things that didn't seem to have any bearing on the case, but at last I came to a most significant phrase: Has been tried with success as an antidote for atropine poisoning.
'I can't tell you the light that dawned upon me then. I never had thought it likely that Geoffrey Denman would commit suicide. No, this new solution was not only possible, but I was absolutely sure it was the correct one, because all the pieces fitted in logically.'
'I am not going to try to guess,' said Raymond. 'Go on. Aunt Jane, and tell us what was so startlingly clear to you.'
'I don't know anything about medicine, of course,' said Miss Marple, 'but I did happen to know this, that when my eyesight was failing, the doctor ordered me drops with atropine sulphate in them. I went straight upstairs to old Mr Denman's room. I didn't beat about the bush.
'"Mr Denman," I said, "I know everything. Why did you poison your son?"
'He looked at me for a minute or two – rather a handsome old man he was, in his way – and then he burst out laughing. It was one of the most vicious laughs I have ever heard. 1 can assure you it made my flesh creep. I had only heard anything like it once before, when poor Mrs Jones went off her head.
'"Yes," he said, "I got even with Geoffrey. I was too clever for Geoffrey. He was going to put me away, was he? Have me shut up in an asylum? I heard them talking about it. Mabel is a good girl – Mabel stuck up for me, but I knew she wouldn't be able to stand up against Geoffrey. In the end he would have his own way; he always did. But I settled him – I settled my kind, loving son! Ha, ha! I crept down in the night. It was quite easy. Brewster was away. My dear son was asleep; he had a glass of water by the side of his bed; he always woke up in the middle of the night and drank it off. I poured it away – ha, ha! – and I emptied the bottle of eyedrops into the glass. He would wake up and swill it down before he knew what it was. There was only a table-spoonful of it – quite enough, quite enough. And so he did! They came to me in the morning and broke it to me very gently. They were afraid it would upset me. Ha! Ha! Ha! Ha! Ha!"
'Well,' said Miss Marple, 'that is the end of the story. Of course, the poor old man was put in an asylum. He wasn't really responsible for what he had done, and the truth was known, and everyone was sorry for Mabel and could not do enough to make up to her for the unjust suspicions they had had. But if it hadn't been for Geoffrey realizing what the stuff was he had swallowed and trying to get everybody to get hold of the antidote without delay, it might never have been found out I believe there are very definite symptoms with atropine – dilated pupils of the eyes, and all that; but, of course, as I have said, Dr Rawlinson was very shortsighted, poor old man. And in the same