I. ON THE WAY BACK FROM THE GAME

II. FRANK'S WAY
III. SOMETHING ABOUT THE BIRD BOYS
IV. A STARTLING DISCOVERY
V. A WARM FIVE MINUTES
VI. IN SEARCH OF A CLUE
VII. ANDY RECEIVES A SHOCK
VIII. THE MESSAGE
IX. UNDER TROUBLED SKIES
X. NIPPED IN THE BUD
XI. OUT OF THE FRYING PAN INTO THE FIRE
XII. A GREAT SURPRISE
XIII. THE "DEVIL-BIRD"
XIV. THE AIRSHIP LAUNCHED AT LAST
XV. AN UNPLEASANT SURPRISE
XVI. THE AIR CHASE
XVII. THE CAMP IN THE TROPICAL JUNGLE
XVIII. WHEN FRANK STOOD GUARD
XIX. FIREBRANDS AND JAGUARS
XX. THE AEROPLANE BOYS ONCE MORE AFLOAT
XXI. THE LAST LITTLE HOT AIR BALLOON
XXII. RESCUED
XXIII. HOMEWARD BOUND—CONCLUSION