‘I’ve got an idea too now,’ said Pip, rather sulkily.

‘What?’ said Bets.

‘Well - if I got a bit of paper and stuck it in an envelope, and wrote Gladys’s name and our address on it and posted it - Mother would re-address it and I could hang about and see what it was, when she puts the letter on the hall-stand to be posted,’ said Pip.

‘Yes, that’s a very fine idea too,’ said Fatty. ‘Couldn’t have thought of a much better one myself. Go to the top of the class, Pip.’

Pip grinned. ‘Well - both Bets and I will carry out our ideas,’ he said, ‘and surely one of us will get Gladys’s address!’

‘Here’s a bit of paper and an envelope,’ said Fatty. ‘But disguise your writing, Pip.’

‘Why?’ said Pip, surprised.

‘Well - seeing that your mother gets a letter from you every single week when you’re away at boarding-school, it’s likely she might recognize your writing and wonder why on earth you were writing to Gladys when she was gone!’ said Fatty, in a very patient, but rather tired voice.

‘Fatty thinks of everything!’ said Daisy admiringly. Pip saw the point at once, but doubted very much if he could disguise his writing properly.

‘Here - give it to me. I’ll do it,’ said Fatty, who was apparently able to disguise his writing as easily as he could disguise his appearance and his voice. He took the envelope, and, to the children’s enormous admiration, wrote Gladys’s name and Pip’s address in a small, extremely grown-up handwriting, quite unlike his own.