‘Yes,’ said Fatty airily. ‘I won it last term for the best essay. Didn’t I tell you? It was a marvellous essay, all about...’

‘All right, all right,’ said Larry and Pip together. ‘We’ll take your word for it, Fatty!’

‘I had a marvellous report again,’ said Fatty. ‘Did you, Pip?’

‘You know I didn’t,’ said Pip. ‘You heard my mother say so. Shut up, Fatty.’

‘Let’s talk about our new mystery,’ said Daisy, seeing that a quarrel was about to flare up. ‘Write down some notes, Fatty. Let’s get going.’

‘I was just about to,’ said Fatty, rather pompously. He printed in beautiful small letters a heading to the page in the lovely leather notebook he held. The others looked to see what he had printed:

MYSTERY NO. 4. BEGUN APRIL 5TH.

‘Ooh - that looks fine,’ said Bets.

‘CLUES’ was the next thing printed by Fatty, over the page.

‘But we haven’t got any,’ said Pip.