Copyright, 1917, by
AMERICAN AUTHORS PUBLISHING CO.
CONTENTS
| CHAPTER | PAGE | |
| I | An Interrupted Journey | [15] |
| II | Their Experiences with the Uhlans | [25] |
| III | The Wrecked Train | [34] |
| IV | The Work of a Spy | [41] |
| V | The Struggle through the Country | [54] |
| VI | On the Road to Liège | [59] |
| VII | A Thrilling Fight | [72] |
| VIII | They Reach the Belgian Forces | [84] |
| IX | The First Battle | [96] |
| X | In the Messenger Service | [107] |
| XI | Pursued by the Uhlans | [118] |
| XII | Catching a Spy | [132] |
| XIII | The Loss of Their Machines in Battle | [147] |
| XIV | The Capture and Escape | [161] |
LIST OF ILLUSTRATIONS
| "They Are the Fellows Who Stopped Our Train," Said Ralph | [Frontispiece] |
| Page | |
| Belgian Flag | [18] |
| German 42-Centimeter Gun | [61] |
| Using Dipper to Find North | [79] |
| Shrapnel Shell | [90] |
| Exploding Shrapnel | [91] |
| German Taube Airplane | [97] |
| A Dome-Topped Fort of Liège | [118] |
| Map of Liège | [131] |
| Map of Louvain | [165] |
THE BOY VOLUNTEERS
ON THE
BELGIAN FRONT