| CHAPTER | | PAGE |
| I | The Twenty-fifth of September | [1] |
| II | France in Mourning | [14] |
| III | Two Great Men Meet | [31] |
| IV | The Allies at Work | [47] |
| V | At the Café des Voyageurs | [60] |
| VI | The Mysterious Signals | [77] |
| VII | The Hut in the Grove | [88] |
| VIII | The Second Installation | [108] |
| IX | Checkmate | [124] |
| X | The Land of Freedom | [137] |
| XI | Shipmates | [147] |
| XII | Under Russian Rule | [158] |
| XIII | In the Wireless House | [170] |
| XIV | The Message | [182] |
| XV | A Word of Warning | [196] |
| XVI | A Charge To Keep | [208] |
| XVII | The First Conference | [221] |
| XVIII | The Substitute Sentry | [239] |
| XIX | The Second Conference | [256] |
| XX | The Prince Seeks Diversion | [269] |
| XXI | On the Education of Princes | [283] |
| XXII | The Events of Monday | [296] |
| XXIII | The Landing | [310] |
| XXIV | Pachmann Scores | [321] |
| XXV | The Trap | [334] |
| XXVI | The Turn of the Screw | [346] |
| XXVII | The Voice at the Door | [357] |
| XXVIII | Crochard, the Invincible! | [370] |
| XXIX | The Escape | [382] |
| XXX | Council of War | [397] |
| XXXI | The Alliance Ends | [407] |
| XXXII | Strasbourg | [420] |