And nothing happened at all. The Murdstone man passed by. He gave a cold, sour, unrecognising glance at the three C.’s, but he never looked at Rupert. He looked over his head as though Rupert had not been there, and passed on.

He looked over his head as though Rupert had not been there.

Rupert grew very red and said nothing. The girls looked at each other.

‘Let’s walk along by the river,’ said Caroline, ‘and then we’ll tell you why he didn’t look at you.’

‘You’ll tell me now,’ said Rupert firmly, ‘or I won’t go another step.’

‘He didn’t look at you,’ said Charlotte, ‘because he didn’t see you. And he didn’t see you because you were invisible just when you wanted to be.’

‘I didn’t want to be,’ said Rupert; ‘at least—— Oh, well, come on.’