CONTENTS

CHAPTERPAGE
I. Waiting for the Hop-Off[9]
II. Arrival of a Stranger[22]
III. Treachery Afoot[39]
IV. The Tamperer Captured[51]
V. Startling Reports[63]
VI. New War Clouds[83]
VII. Summoned to Washington[92]
VIII. "Deliver These at Paris"[101]
IX. Off to Europe[111]
X. Pursued by an Enemy Plane[118]
XI. In the Teeth of a Hurricane[126]
XII. Desperate Haste[135]
XIII. The Battle in the Clouds[144]
XIV. Destruction of the Enemy[152]
XV. Fuel from a Tanker[160]
XVI. A Matter of Hours[169]
XVII. The Ten-Mile Glide[175]
XVIII. A Runaway Plane[185]
XIX. The Sleep-walker[196]
XX. Kidnaped[206]
XXI. The Arrival in Paris[217]
XXII. World Peace Assured[222]