Poirot’s Early Cases by Agatha Christie

‘Ah,’ said Poirot. ‘And how is he going to do it?’

‘Petrol and the garden syringe. He’s bringing his own syringe over; it’s a more convenient size than mine.’

‘There is another way, is there not?’ asked Poirot. ‘With cyanide of potassium?’

Harrison looked a little surprised. ‘Yes, but that’s rather dangerous stuff. Always a risk having it about the place.’

Poirot nodded gravely. ‘Yes, it is deadly poison.’ He waited a minute and then repeated in a grave voice, ‘Deadly poison.’

‘Useful if you want to do away with your mother-in-law, eh?’ said Harrison with a laugh.

But Hercule Poirot remained grave. ‘And you are quite sure, Monsieur Harrison, that it is with petrol that Monsieur Langton is going to destroy your wasps’ nest?’

‘Quite sure. Why?’

‘I wondered. I was at the chemist’s in Barchester this afternoon. For one of my purchases I had to sign the poison book. I saw the last entry. It was for cyanide of potassium and it was signed by Claude Langton.’

Harrison stared. ‘That’s odd,’ he said. ‘Langton told me the other day that he’d never dream of using the stuff; in fact, he said it oughtn’t to be sold for the purpose.’

Poirot looked out over the garden. His voice was very quiet as he asked a question. ‘Do you like Langton?’

The other started. The question somehow seemed to find him quite unprepared. ‘I—I—well, I mean—of course, I like him. Why shouldn’t I?’

‘I only wondered,’ said Poirot placidly, ‘whether you did.’

And as the other did not answer, he went on. ‘I also wondered if he liked you?’

‘What are you getting at, Monsieur Poirot? There’s something in your mind I can’t fathom.’

‘I am going to be very frank. You are engaged to be married, Monsieur Harrison. I know Miss Molly Deane. She is a very charming, a very beautiful girl. Before she was engaged to you, she was engaged to Claude Langton. She threw him over for you.’

Harrison nodded.

‘I do not ask what her reasons were: she may have been justified. But I tell you this, it is not too much to suppose that Langton has not forgotten or forgiven.’

‘You’re wrong, Monsieur Poirot. I swear you’re wrong. Langton’s been a sportsman; he’s taken things like a man. He’s been amazingly decent to me—gone out of his way to be friendly.’

‘And that does not strike you as unusual? You use the word “amazingly”, but you do not seem to be amazed.’

‘What do you mean, M. Poirot?’

‘I mean,’ said Poirot, and his voice had a new note in it, ‘that a man may conceal his hate till the proper time comes.’

‘Hate?’ Harrison shook his head and laughed.

‘The English are very stupid,’ said Poirot. ‘They think that they can deceive anyone but that no one can deceive them. The sportsman—the good fellow—never will they believe evil of him. And because they are brave, but stupid, sometimes they die when they need not die.’

‘You are warning me,’ said Harrison in a low voice. ‘I see it now—what has puzzled me all along. You are warning me against Claude Langton. You came here today to warn me…’

Poirot nodded. Harrison sprang up suddenly. ‘But you are mad, Monsieur Poirot. This is England. Things don’t happen like that here. Disappointed suitors don’t go about stabbing people in the back and poisoning them. And you’re wrong about Langton. That chap wouldn’t hurt a fly.’

‘The lives of flies are not my concern,’ said Poirot placidly. ‘And although you say Monsieur Langton would not take the life of one, yet you forget that he is even now preparing to take the lives of several thousand wasps.’

Harrison did not at once reply. The little detective in his turn sprang to his feet. He advanced to his friend and laid a hand on his shoulder. So agitated was he that he almost shook the big man, and, as he did so, he hissed into his ear: ‘Rouse yourself, my friend, rouse yourself. And look—look where I am pointing. There on the bank, close by that tree root. See you, the wasps returning home, placid at the end of the day? In a little hour, there will be destruction, and they know it not. There is no one to tell them. They have not, it seems, a Hercule Poirot. I tell you, Monsieur Harrison, I am down here on business. Murder is my business. And it is my business before it has happened as well as afterwards. At what time does Monsieur Langton come to take this wasps’ nest?’