CHAPTER I MUMMY CAnON
CHAPTER II SOMETHING ABOUT DR. BYRD
CHAPTER III A FALL FROM THE AIR
CHAPTER IV THE WRECK AND THE AVIATOR
CHAPTER V LOST!
CHAPTER VI THE SCREAM IN THE WATERFALL
CHAPTER VII A BADLY FRIGHTENED BOY
CHAPTER VIII HAL'S DISCOVERY
CHAPTER IX HAL A PRISONER
CHAPTER X THE MYSTERY OF THE LEATHER BAG
CHAPTER XI CONVINCING BAD.
CHAPTER XII AIRSHIP PLANS
CHAPTER XIII THE "PAINTER"
CHAPTER XIV BUILDING THE AIRSHIP
CHAPTER XV STOLEN WEALTH
CHAPTER XVI FLIGHT
CHAPTER XVII EXPLORING THE CAVE
CHAPTER XVIII THE ISLAND IN THE AIR
CHAPTER XIX THE RESCUING AIRSHIP
CHAPTER XX THE PANTHER AND THE CAVE
CHAPTER XXI TO FLATHEAD BY AIRSHIP AGAIN.
CHAPTER XXII CLEARING HAL
CHAPTER XXIII THE BOY SCOUTS OF THE AIR.
CHAPTER XXIV MOUNTAIN LION BRIDGE
