"What a chance!" thought Florence, as she finished reading the letter. She folded it up and slipped it into her pocket; the next instant she had crossed the room, had opened Kitty's desk, and taken out the envelope with its folded sheet of paper within.  She unfolded the paper and glanced at its contents.  One quick glance was sufficient.  She put back the paper into the envelope, shut Kitty's desk, and returned to her own.