"Oh no! No, really I haven't," Neville replied, with his apologetic smile. "I climbed out of my window, and over the wall."
"You - Did you really?" exclaimed Sally, her thunderous frown vanishing. "I must say I should never have thought it of you."
"Atavism," he explained.
"Oh, Neville, how on earth did you manage it?" Helen asked, a note of admiration in her voice.
He looked alarmed. "Please don't get misled! It wasn't a bit heroic, or daring, or even difficult."
"It must have been. I can't think how you did it! I should never have had the nerve."
"No nerve. Merely one of the advantages of a University education."
"Well, I think it was fairly sporting of you," said Sally. "Only it doesn't help us to solve the problem of how to get those IOUs."
"Don't strain yourself," Neville recommended. "You can't get them. They're probably in Ernie's safe, just like you suggested."
"There are ways of opening safes," said Sally darkly, cupping her chin in her hands. "I suppose you don't happen to know the combination?"