"Can't stay longer, mother," he said. "I'm up front, the Prefects have got two compartments to themselves."
"Oh, are you a Prefect, Percy?" said one of the twins, with an air of great surprise. "You should have said something, we had no idea."
"Hang on, I think I remember him saying something about it." said the other twin. "Once."
"Or twice."
"A minute."
"All summer."
"Oh, shut up," said Percy the Prefect.