VIII. A Safe Return 83 IX. Thrilling News 94 X. The Aëroplane Boys in Luck 106 XI. The Man in the Locker 117 XII. Frank Makes a Bargain 129 XIII. Not Caught Napping 142 XIV. The Peril in the Sky 151 XV. On Guard 162 XVI. The Coming of the Dawn 173 XVII. News by Wireless 185 XVIII. Off with the Air Raiders 196 XIX. How Zeebrugge was Bombarded 207 XX. Caught in a Snow Squall 218 XXI. A Startling Discovery 230 XXII. The Narrow Escape 241 XXIII. The Windmill Fort 252