CONTENTS
| CHAPTER | PAGE | |
| [I] | A Call to Battle | 1 |
| [II] | The Accident | 11 |
| [III] | Monsieur Secor | 20 |
| [IV] | All Aboard | 29 |
| [V] | Anxious Days | 39 |
| [VI] | A Queer Conference | 47 |
| [VII] | "Periscope Ahoy!" | 56 |
| [VIII] | Beaten Off | 65 |
| [IX] | Suspicions | 72 |
| [X] | The Flashlight | 80 |
| [XI] | The Depth Charge | 88 |
| [XII] | In England | 97 |
| [XIII] | Under Suspicion | 105 |
| [XIV] | In Custody | 114 |
| [XV] | The Front at Last | 121 |
| [XVI] | The Firing Line | 130 |
| [XVII] | Bowled Over | 138 |
| [XVIII] | Trench Life | 145 |
| [XIX] | Gassed | 153 |
| [XX] | "Gone!" | 161 |
| [XXI] | Across No Man's Land | 170 |
| [XXII] | Captured | 179 |
| [XXIII] | The Airship Raid | 189 |
| [XXIV] | Buried Alive | 199 |
| [XXV] | The End of Labenstein | 206 |