---CHAPTER ICONTENTS
| CHAPTER | | PAGE |
| I. | The Spy Alarm | [1] |
| II. | A Man and a Snake | [11] |
| III. | A Puzzled Professor | [18] |
| IV. | A Two-Girl Problem | [29] |
| V. | More Girls | [35] |
| VI. | Noddy Nixon | [43] |
| VII. | Off for France | [53] |
| VIII. | The Training Camp | [59] |
| IX. | On the Firing Line | [71] |
| X. | In the Trenches | [78] |
| XI. | A Night Patrol | [88] |
| XII. | Bob Is Missing | [96] |
| XIII. | “Just Like Him!” | [108] |
| XIV. | A Desperate Chance | [116] |
| XV. | The Sniper | [123] |
| XVI. | Over the Top | [129] |
| XVII. | “Fried Holes” | [136] |
| XVIII. | The School Janitor | [145] |
| XIX. | News at Last | [153] |
| XX. | A Queer Question | [162] |
| XXI. | A Visitor | [171] |
| XXII. | An Unexpected Capture | [177] |
| XXIII. | Great Preparations | [184] |
| XXIV. | “S. I. W.” | [194] |
| XXV. | The Black Box | [201] |
| XXVI. | A Disappearance | [209] |
| XXVII. | St. Mihiel | [218] |
| XXVIII. | In Argonne Forest | [226] |
| XXIX. | Captured | [232] |
| XXX. | Recaptured | [243] |
1
NED, BOB AND JERRY
ON THE FIRING LINE