CONTENTS
| CHAPTER | PAGE | |
| [I] | Buried Alive | 1 |
| [II] | A Strange Sight | 9 |
| [III] | Another Puzzle | 18 |
| [IV] | Recognition | 26 |
| [V] | Battling Onward | 37 |
| [VI] | Poor Schnitz | 44 |
| [VII] | Days of Sorrow | 53 |
| [VIII] | Startling Information | 60 |
| [IX] | Ugly Threats | 68 |
| [X] | Disquieting Rumors | 77 |
| [XI] | The Signals | 85 |
| [XII] | News From the Air | 92 |
| [XIII] | A Forward Rush | 101 |
| [XIV] | Unseen Marksmen | 108 |
| [XV] | Over the Cliff | 116 |
| [XVI] | Only Two Left | 125 |
| [XVII] | Blown Up | 132 |
| [XVIII] | A Strange Meeting | 140 |
| [XIX] | In Swirling Waters | 148 |
| [XX] | The Cave Fight | 155 |
| [XXI] | A Desperate Resolve | 166 |
| [XXII] | The Escape | 172 |
| [XXIII] | The Secret Pact | 182 |
| [XXIV] | Through the Lines | 194 |