CONTENTS
| CHAPTER | PAGE | |
|---|---|---|
| I. | [The Way of the Hun] | 1 |
| II. | [With the Coast Patrol] | 14 |
| III. | [The Lonely Reef] | 26 |
| IV. | [A Battle Underground] | 38 |
| V. | [A Chance Encounter] | 50 |
| VI. | [On the Thames] | 65 |
| VII. | [The U. S. S. “Gyandotte”] | 78 |
| VIII. | [The Raider] | 87 |
| IX. | [Off for the Other Side] | 95 |
| X. | [Overboard!] | 106 |
| XI. | [Twenty Fathoms Down] | 117 |
| XII. | [In the Submarine “Q-4”] | 133 |
| XIII. | [“Surface!”] | 148 |
| XIV. | [In an Irish Mist] | 161 |
| XV. | [The Mysterious Signals] | 177 |
| XVI. | [Through the Night] | 193 |
| XVII. | [Boys in Khaki] | 203 |
| XVIII. | [Tip, of the “Sans Souci”] | 217 |
| XIX. | [Off Heligoland] | 235 |
| XX. | [The Battle in the North Sea] | 247 |
| XXI. | [Castaways] | 258 |
| XXII. | [Mart Turns up] | 272 |
| XXIII. | [The Captain Comes Aboard] | 284 |