| I. | The Start for Palilo | [ 9] |
| II. | A Polite Captor | [ 25] |
| III. | A Leak of Military Information | [ 41] |
| IV. | Landed in Captivity | [ 54] |
| V. | Captain Blynn Marches | [ 71] |
| VI. | The “Mindinao” | [ 83] |
| VII. | The Gunboat Coöperates | [ 101] |
| VIII. | The Privileges of Rank | [ 119] |
| IX. | The Katipunan Society | [ 138] |
| X. | In the Shadow of a Suspicion | [ 158] |
| XI. | A Traitor Unmasked | [ 175] |
| XII. | The Midshipmen Reconnoitre | [ 189] |
| XIII. | Unwelcome Companions | [ 212] |
| XIV. | Cleverly Outwitted | [ 225] |
| XV. | A Night of Alarm | [ 241] |
| XVI. | A Filipino Martyr | [ 259] |
| XVII. | A Daring Plan | [ 277] |
| XVIII. | A River Expedition | [ 292] |
| XIX. | A Willing Captive | [ 308] |
| XX. | The Struggle for the Stronghold | [ 324] |
| XXI. | The Gunboat Takes a Hand | [ 336] |
| XXII. | The Escaped Outlaw | [ 346] |
| XXIII. | Colonel Martinez | [ 355] |
| XXIV. | The Gunboat on Guard | [ 366] |
| XXV. | Conclusion | [ 377] |