Miss Martin paused, and a wave of horror passed over the school. As for Peggy, her blood ran cold. It had never struck her before that the act of placing the book in Mary's desk could be open to such a construction. She had meant it all for a joke, and thought Mary would have been the first to join in the fun, and then Nora would, of course, have taken it back. She saw now that, while they had still been romping at rounders, Mary must have gone up to the schoolroom, and finding the missing notes in her desk, had carried them at once to the library.