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  • Why, did you know that if a beaver two feet long with a tail a foot and a half long can build a dam twelve feet high and six feet wide in two days, all you would need to build Boulder Dam is a beaver sixty-eight feet long with a fifty-one-foot tail?" "Where would you find a beaver that big?" grumbled the Humbug as his pencil point snapped. "I'm sure I don't know," he replied, "but if you did, you'd certainly know what to do with him.

    Norton Juster (2011). “The Phantom Tollbooth 50th Anniversary Edition”, p.175, Knopf Books for Young Readers