Facing Page "THERE IS SOMEBODY OR SOMETHING INSIDE THE BARRED ROOM!" SHE GASPED _Frontispiece_ A SMALL BOY WAS WAVING HIS CAP IN FRANTIC WELCOME 48 THE MAN APPEARED TO HAVE MANY DIRECTIONS TO GIVE 96 GERDA DARTED UPON THE BATHFUL OF OLD LETTERS 200 THE SCHOOL BY THE SEA CHAPTER I The Interloper Girls! Girls everywhere! Girls in the passages, girls in the hall, racing upstairs and scurrying downstairs, diving into dormitories and running into classrooms, overflowing on to the landing and hustling along the corridor--everywhere, girls! There were tall and short, and fat and thin, and all degrees from pretty to plain; girls with fair hair and girls with dark hair, blue-eyed, brown-eyed, and grey-eyed girls; demure girls, romping girls, clever girls, stupid girls--but never a silent girl. No! Buzz-hum-buzz! The talk and chatter surged in a full, steady flow round the house till the noise invaded even that sanctuary of sanctuaries, the private study, where Miss Birks, the Principal, sat addressing post cards to inform respective parents of the safe arrival of the various individual members of the frolicsome crew which had just reassembled after the Christmas vacation. In ordinary circumstances such an indiscretion as squealing on the stairs or dancing in the passages would have brought Miss Birks from her den, dealing out stern rebukes, if not visiting dire justice on the offenders; but for this one brief evening--the first night of the term--the old house was Liberty Hall. Each damsel did what seemed good in her own eyes, and talked, laughed, and joked to her heart's content. "Let them fizz, poor dears!" said Miss Birks, smiling to herself as a special outburst of mirth was wafted up from below. "It does them good to work off steam when they arrive. They'll have to be quiet enough to-morrow. Really, the twenty make noise enough for a hundred! They're all on double-voice power to-night! Shades of the Franciscans, what a noise! It seems almost sacrilege in an old convent."