Frontispiece: WITH A GRINDING CRASH THE EARTH ON WHICH JOE STOOD WENT OUT FROM UNDER HIM.[Chapter XIX]
CHAPTER I TO THE RESCUE
CHAPTER II ON THE BRINK
CHAPTER III A SURPRISE
CHAPTER IV A DELAYED LETTER
CHAPTER V ANOTHER SURPRISE
CHAPTER VI SOMETHING QUEER
CHAPTER VII IN NEW YORK
CHAPTER VIII OFF FOR PANAMA
CHAPTER IX THE LITTLE BOX
CHAPTER X THE SECRET CONFERENCE
CHAPTER XI ALONG THE CANAL
CHAPTER XII ALMOST AN ACCIDENT
CHAPTER XIII IN THE JUNGLE
CHAPTER XIV IN DIRE PERIL
CHAPTER XV IN CULEBRA CUT
CHAPTER XVI THE COLLISION
CHAPTER XVII THE EMERGENCY DAM
CHAPTER XVIII THE BIG SLIDE
CHAPTER XIX JOE'S PLIGHT
CHAPTER XX AT GATUN DAM
CHAPTER XXI MR. ALCANDO'S ABSENCE
CHAPTER XXII A WARNING
CHAPTER XXIII THE FLASHLIGHT
CHAPTER XXIV THE TICK-TOCK
CHAPTER XXV MR. ALCANDO DISAPPEARS
With a series of puffs and chugs a big, shiny motor cycle turned from the road into the graveled drive at the side of a white farmhouse. Two boys sat on the creaking saddles. The one at the front handle bars threw forward the clutch lever, and then turned on the power sharply to drive the last of the gases out of the twin cylinders.