‘Oh! Miss Marple,’ cried Mrs Bantry. ‘You don’t really mean—’

‘My dear, these things are very common—very common indeed. And gentlemen are especially tempted, being so much the stronger. So easy if a thing looks like an accident. As I say, I knew at once with the Sanders. It was on a tram. It was full inside and I had had to go on top. We all three got up to get off and Mr Sanders lost his balance and fell right against his wife, sending her headfirst down the stairs. Fortunately the conductor was a very strong young man and caught her.’

‘But surely that must have been an accident.’

‘Of course it was an accident—nothing could have looked more accidental! But Mr Sanders had been in the Merchant Service, so he told me, and a man who can keep his balance on a nasty tilting boat doesn’t lose it on top of a tram if an old woman like me doesn’t. Don’t tell me!’

‘At any rate we can take it that you made up your mind, Miss Marple,’ said Sir Henry. ‘Made it up then and there.’

The old lady nodded.

‘I was sure enough, and another incident in crossing the street not long afterwards made me surer still. Now I ask you, what could I do, Sir Henry? Here was a nice contented happy little married woman shortly going to be murdered.’

‘My dear lady, you take my breath away.’

‘That’s because, like most people nowadays, you won’t face facts. You prefer to think such a thing couldn’t be. But it was so, and I knew it. But one is so sadly handicapped! I couldn’t, for instance, go to the police. And to warn the young woman would, I could see, be useless. She was devoted to the man. I just made it my business to find out as much as I could about them. One has a lot of opportunities doing one’s needlework round the fire. Mrs Sanders (Gladys, her name was) was only too willing to talk. It seems they had not been married very long. Her husband had some property that was coming to him, but for the moment they were very badly off. In fact, they were living on her little income. One has heard that tale before. She bemoaned the fact that she could not touch the capital. It seems that somebody had had some sense somewhere! But the money was hers to will away—I found that out. And she and her husband had made wills in favour of each other directly after their marriage. Very touching. Of course, when Jack’s affairs came right—That was the burden all day long, and in the meantime they were very hard up indeed—actually had a room on the top floor, all among the servants—and so dangerous in case of fire, though, as it happened, there was a fire escape just outside their window. I inquired carefully if there was a balcony—dangerous things, balconies. One push—you know!