He took from his pocket a photograph.

‘First, I will pass round this photograph.’

Kelsey took it, handed it to Miss Bulstrode and she in turn handed it to the staff. It was returned to Poirot. He looked at their faces, which were quite blank.

‘I ask you, all of you, do you recognize the girl in that photograph?’

One and all they shook their heads.

‘You should do so,’ said Poirot. ‘Since that is a photograph obtained by me from Geneva of Princess Shaista.’

‘But it’s not Shaista at all,’ cried Miss Chadwick.

‘Exactly,’ said Poirot. ‘The threads of all this business start in Ramat where, as you know, a revolutionary coup d’état took place about three months ago. The ruler, Prince Ali Yusuf, managed to escape, flown out by his own private pilot. Their plane, however, crashed in the mountains north of Ramat and was not discovered until later in the year. A certain article of great value, which was always carried on Prince Ali’s person, was missing. It was not found in the wreck and there were rumours that it had been brought to this country. Several groups of people were anxious to get hold of this very valuable article. One of their leads to it was Prince Ali Yusuf’s only remaining relation, his first cousin, a girl who was then at a school in Switzerland. It seemed likely that if the precious article had been safely got out of Ramat it would be brought to Princess Shaista or to her relatives and guardians. Certain agents were detailed to keep an eye on her uncle, the Emir Ibrahim, and others to keep an eye on the Princess herself. It was known that she was due to come to this school, Meadowbank, this term. Therefore it would have been only natural that someone should be detailed to obtain employment here and to keep a close watch on anyone who approached the Princess, her letters, and any telephone messages. But an even simpler and more efficacious idea was evolved, that of kidnapping Shaista and sending one of their own number to the school as Princess Shaista herself. This could be done successfully since the Emir Ibrahim was in Egypt and did not propose to visit England until late summer. Miss Bulstrode herself had not seen the girl and all arrangements that she had made concerning her reception had been made with the Embassy in London.

‘The plan was simple in the extreme. The real Shaista left Switzerland accompanied by a representative from the Embassy in London. Or so it was supposed. Actually, the Embassy in London was informed that a representative from the Swiss school would accompany the girl to London. The real Shaista was taken to a very pleasant chalet in Switzerland where she has been ever since, and an entirely different girl arrived in London, was met there by a representative of the Embassy and subsequently brought to this school. This substitute, of course, was necessarily much older than the real Shaista. But that would hardly attract attention since Eastern girls noticeably look much more mature than their age. A young French actress who specializes in playing schoolgirl parts was the agent chosen.