CHAPTER I A SPLENDID IDEA
CHAPTER 2 HOLIDAY HOUSE
CHAPTER 3 AT TEATIME
CHAPTER 4 A LITTLE EXPLORING
CHAPTER 5 UP IN THE TOWER
CHAPTER 6 RUTH GETS INTO TROUBLE
CHAPTER 7 THE PICNIC
CHAPTER 8 A MOST EXCITING DISCOVERY
CHAPTER 9 FOOTPRINTS—AND A LOCKED DOOR
CHAPTER 10 A REAL PUZZLE
CHAPTER 11 TROUBLE
CHAPTER 12 THE MAN WITH YELLOW HAIR
CHAPTER 13 GRAHAM TELLS A SECRET
CHAPTER 14 THE TWINS ARE VERY CLEVER
CHAPTER 15 SOME EXCITING THINGS HAPPEN
CHAPTER 16 STRANGE JOURNEY—AND HAPPY ENDING
