Air Service Boys Over the Enemy's Lines
THE DUEL IN MID-AIR.
Air Service Boys Over The
Enemy's Lines
OR
The German Spy's Secret
BY
CHARLES AMORY BEACH
Author of "Air Service Boys Flying for France"
THE WORLD SYNDICATE PUBLISHING CO.
CLEVELAND, O. NEW YORK, N. Y.
Copyright, MCMXIX by
GEORGE SULLY & COMPANY
Printed in the United States of America
by
THE COMMERCIAL BOOKBINDING CO.
CLEVELAND, O.
AIR SERVICE BOYS OVER THE
ENEMY'S LINE
CONTENTS
| CHAPTER | PAGE | |
| I. | Back of the Trenches | 1 |
| II. | The Winged Messenger | 10 |
| III. | A Spy Baffled | 19 |
| IV. | Praise from the General | 27 |
| V. | The Strange Warning | 35 |
| VI. | Looking Backward | 45 |
| VII. | The Great Day Arrives | 53 |
| VIII. | Over the Enemy's Lines | 61 |
| IX. | Winning His Spurs | 70 |
| X. | After the Battle | 78 |
| XI. | A Show on the Front | 85 |
| XII. | Clowns on the Wing | 94 |
| XIII. | More Work in Prospect | 103 |
| XIV. | Off on a Daring Mission | 113 |
| XV. | The Moonlight Flight | 120 |
| XVI. | Landing Close to Metz | 129 |
| XVII. | More Trouble for the Chums | 137 |
| XVIII. | The Lone House by the Roadside | 144 |
| XIX. | A Nest of Spies | 153 |
| XX. | Jack Climbs a Wall | 162 |
| XXI. | In the Old Lorraine Chateau | 171 |
| XXII. | Facing More Difficulties | 181 |
| XXIII. | Left Behind in the Enemy's Country | 191 |
| XXIV. | Troublous Times for Jack | 200 |
| XXV. | Back to Safety—Conclusion | 208 |