| Chap. | | Page |
| I. | [Paid Off] | 9 |
| II. | [A Day of Surprises] | 17 |
| III. | [Uncle Brian] | 27 |
| IV. | [Don Ramon Diaz] | 34 |
| V. | [The Menace] | 40 |
| VI. | [The Super Flying-boat] | 48 |
| VII. | [Peter's First Ascent] | 54 |
| VIII. | [Uncle Brian's Secret] | 62 |
| IX. | [The Proving of the Rays] | 69 |
| X. | [Plans for Escape] | 79 |
| XI. | [Up the Rio Guaya] | 87 |
| XII. | ["Caught Out"] | 100 |
| XIII. | [Wrecked] | 110 |
| XIV. | [A Change of Locomotion] | 120 |
| XV. | [Over the Sierras] | 131 |
| XVI. | ["Crashed"] | 143 |
| XVII. | [The Passage Perilous] | 152 |
| XVIII. | [Orders for Cavendish] | 162 |
| XIX. | [The Decoy Ship] | 169 |
| XX. | [Two Against One] | 180 |
| XXI. | [A Stern Chase] | 191 | |
| XXII. | [Flying-boats versus Destroyers] | 200 |
| XXIII. | [At the Admiralty] | 212 |
| XXIV. | [War in Home Waters] | 224 |
| XXV. | [Seaplane and Submarine] | 232 |
| XXVI. | [Orders to Proceed] | 241 |
| XXVII. | [In Action—Fore-top] | 250 |
| XXVIII. | [In Action—'Tween Decks] | 265 |
| XXIX. | [After the Battle] | 279 |
| XXX. | [The End of the Rioguayan Air Fleet] | 288 |
| XXXI. | [Peter Goes Ashore] | 299 |
| XXXII. | ["The Fence Impregnable"] | 311 | |