The Phantom Tollbooth
There, piled into enormous mounds that reached almost to the ceiling, were not only diamonds and emeralds and rubies but also sapphires, amethysts, topazes, moonstones, and garnets. It was the most amazing mass of wealth that any of them had ever seen.
"They're such a terrible nuisance," sighed the Mathemagician, "and no one can think of what to do with them. So we just keep digging them up and throwing them out. Now," he said, taking a silver whistle from his pocket and blowing it loudly, "let's have some lunch." (14.79-80)
"Oh dear," said Milo sadly and softly. "I only eat when I'm hungry."
"What a curious idea," said the Mathemagician, raising his staff over his head and scrubbing the rubber end back and forth several times on the ceiling. "The next thing you'll have us believe is that you only sleep when you're tired." (15.30-31)
Cringing with fear, the monsters of Ignorance turned in flight and, with anguished cries too horrible ever to forget, returned to the damp, dark places from which they came. The Humbug sighed with relief, and Milo and the princesses prepared to greet the victorious army. (19.21)