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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................................................................................................................................................................................................................................................................................................................................................................................................118 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, or 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 Round................................................................................................................................................................................................................................................................................................................................................................................................284