him off. And I should say that when she got home she went all to pieces. She hadn't meant murder. It's my belief she took an overdose on purpose as the easiest way out.'
'You think that covers all the facts?'
'Well, naturally there are a lot of things we don't know yet. It's a good working hypothesis to go on with. The other explanation is that the hoax and the murder had nothing to do with each other. It's just a damned queer coincidence.'
Poirot did not agree, I knew. But he merely said noncommittally:
'Mais oui, c'est possible.'
'Or, look here, how's this? The hoax is innocent enough. Someone gets to hear of it and thinks it will suit their purpose jolly well. That's not a bad idea?' He paused and went on: 'But personally I prefer idea No. 1. What the link was between his lordship and the girl we'll find out somehow or other.'
Poirot told him of the letter to America posted by the maid, and Japp agreed that that might possibly be of great assistance.
'I'll get on to that at once,' he said, making a note of it in his little book.
'I'm the more in favour of the lady being the killer because I can't find anyone else,' he said, as he put the book away. 'Captain Marsh, now, his lordship as now is. He's got a motive sticking out a yard. A bad record too. Hard up and none too scrupulous over money. What's more he had a row with his uncle yesterday morning. He told me that himself as a matter of fact - which rather takes the taste out of it. Yes, he'd be a likely customer. But he's got an alibi for yesterday evening. He was at the opera with the Dortheimers. Rich Jews. Grosvenor Square. I've looked into that and it's all right. He dined with them, went to the opera and they went on to supper at Sobranis. So that's that.'
'And Mademoiselle?'
'The daughter, you mean? She was out of the house too. Dined with some people called Carthew West. They took her to the opera and saw her home afterwards. Quarter to twelve she got in. That disposes of her. The secretary woman seems all right - very efficient decent woman. Then there's the butler. I can't say I take to him much. It isn't natural for a man to have good looks like that. There's something fishy about him - and something odd about the way he came to enter Lord Edgware's service. Yes, I'm checking up on him all right. I can't see any motive for murder, though.'
'No fresh facts have come to light?'
'Yes, one or two. It's hard to say whether they mean anything or not. For one thing, Lord Edgware's key's missing.'
'The key to the front door?'
'Yes.'
'That is interesting, certainly.'
'As I say, it may mean a good deal or nothing at all. Depends. What is a bit more significant to my mind is this. Lord Edgware cashed a cheque yesterday - not a particularly large one - a hundred pounds as a matter of fact. He took the money in French notes - that's why he cashed the cheque, because of his journey to Paris today. Well, that money has disappeared.'
'Who told you of this?'
'Miss Carroll. She cashed the cheque and obtained the money. She mentioned it to me, and then I found that it had gone.'
'Where was it yesterday evening?'
'Miss Carroll doesn't know. She gave it to Lord Edgware about half-past three. It was in a bank envelope. He was in the library at the time. He took it and laid it down beside him on a table.'
'That certainly gives one to think. It is a complication.'
'Or a simplification. By the way - the wound.'
'Yes?'
'The doctor says it wasn't made by an ordinary penknife. Something of that kind but a different shaped blade. And it was amazingly sharp.'
'Not a razor?'
'No, no. Much smaller.'
Poirot frowned thoughtfully.
'The new Lord Edgware seems to be fond of his joke,' remarked Japp. 'He seems to think it amusing to be suspected of murder. He made sure we did suspect him of murder, too. Looks a bit queer, that.'
'It might be merely intelligence.'
'More likely guilty conscience. His uncle's death came very pat for him. He's moved into the house, by the way.'
'Where was he living before?'
'Martin Street, St George's Road. Not a very swell neighbourhood.'
'You might make a note of that, Hastings.'
I did so, though I wondered a little. If Ronald had moved to Regent