'Why, of course, you'll have to take it back,' said Peggy. 'But,' her love of mischief getting the upper hand, 'I don't see why we shouldn't have a little fun with it first. You won't find Miss Martin in the library now, and it would do quite as well at four o'clock, so suppose you put it inside Mary Hill's desk, just to give her a fright. She's such a goose, she'll give a perfect howl of horror when she finds it, and then we'll pretend to think she must have had it there all the time, and get her into _such_ a state of mind before we tell her.'