Copyright, 1917, by
AMERICAN AUTHORS PUBLISHING CO.


CONTENTS

CHAPTERPAGE
I.The Decision[13]
II.The Fight in Devil's Cut[24]
III.The 75-Millimetre Guns[32]
IV.A Lesson in Observation[42]
V.The Curtain of Fire[50]
VI.A Shelled Battlefield[60]
VII.A Lively Camp Behind the Lines[70]
VIII.The Spies in the Camp[82]
IX.The Laws Against Spies[93]
X.A Difficult Trip to the Main Trenches[104]
XI.Discovering a German Range-Finder[116]
XII.Finding the Enemy's Battery[128]
XIII.The Mysterious Figures on the Range-Finder[140]
XIV.Caught in a Terrific Drive[152]

LIST OF ILLUSTRATIONS

"At them, boys!" shrieked the Corporal[Frontispiece]
PAGE
Method of Signaling from Airplanes[53]
Peculiarities of Trajectories[56]
Peculiarities of Trajectories[57]
The Deadly Shrapnel Shell[68]
The Spy's Account Book[91]
Pontooning Heavy Guns Across a Stream[101]
A German Range-Finder[118]
Arrangement of Guns on Hill 203[138]

THE BOY VOLUNTEERS
WITH THE BRITISH
ARTILLERY