‘Now as to the movements of Mr Sanders. He went out, as I have said, at about five-thirty—or a little after. He did some shopping at a couple of shops and at about six o’clock he entered the Grand Spa Hotel where he encountered two friends—the same with whom he returned to the Hydro later. They played billiards and, I gather, had a good many whiskies and sodas together. These two men (Hitchcock and Spender, their names were) were actually with him the whole time from six o’clock onwards. They walked back to the Hydro with him and he only left them to come across to me and Miss Trollope. That, as I told you, was about a quarter to seven—at which time his wife must have been already dead.

‘I must tell you that I talked myself to these two friends of his. I did not like them. They were neither pleasant nor gentlemanly men, but I was quite certain of one thing, that they were speaking the absolute truth when they said that Sanders had been the whole time in their company.

‘There was just one other little point that came up. It seems that while bridge was going on Mrs Sanders was called to the telephone. A Mr Littleworth wanted to speak to her. She seemed both excited and pleased about something—and incidentally made one or two bad mistakes. She left rather earlier than they had expected her to do.

‘Mr Sanders was asked whether he knew the name of Littleworth as being one of his wife’s friends, but he declared he had never heard of anyone of that name. And to me that seems borne out by his wife’s attitude—she too, did not seem to know the name of Littleworth. Nevertheless she came back from the telephone smiling and blushing, so it looks as though whoever it was did not give his real name, and that in itself has a suspicious aspect, does it not?

‘Anyway, that is the problem that was left. The burglar story, which seems unlikely—or the alternative theory that Mrs Sanders was preparing to go out and meet somebody. Did that somebody come to her room by means of the fire escape? Was there a quarrel? Or did he treacherously attack her?’

Miss Marple stopped.

‘Well?’ said Sir Henry. ‘What is the answer?’

‘I wondered if any of you could guess.’

‘I’m never good at guessing,’ said Mrs Bantry. ‘It seems a pity that Sanders had such a wonderful alibi; but if it satisfied you it must have been all right.’

Jane Helier moved her beautiful head and asked a question.

‘Why,’ she said, ‘was the hat cupboard locked?’

‘How very clever of you, my dear,’ said Miss Marple, beaming. ‘That’s just what I wondered myself. Though the explanation was quite simple. In it were a pair of embroidered slippers and some pocket handkerchiefs that the poor girl was embroidering for her husband for Christmas. That’s why she locked the cupboard. The key was found in her handbag.’