CONTENTS

CHAPTERPAGE
I.“Nobly Rewarded!”[1]
II.Just in Time[10]
III.A New Friend[17]
IV.The “Sybilline” Whistle[29]
V.Four Hundred Dollars[37]
VI.The Airship Idea[45]
VII.Mystery[53]
VIII.At the Aero Meet[60]
IX.A Bomb-dropping Event[67]
X.A Rush Order[74]
XI.The Dart[82]
XII.A Serious Charge[88]
XIII.The Man in the Gig[96]
XIV.The Mysterious Pin[102]
XV.A Mean Enemy[108]
XVI.Stealing an Invention[115]
XVII.On Time[121]
XVIII.The Five Hundred Dollar Prize[128]
XIX.“Go!”[135]
XX.Crusoes of the Air[144]
XXI.A Fight with a Bear[151]
XXII.A Friend in Need[157]
XXIII.The Lost Aviator[163]
XXIV.Homeward Bound[170]
XXV.Conclusion[191]