Meeting an Old Friend 173 XXIV The Sky Slayer 179 XXV In the Glare of the Flames 187 XXVI Two Young Heroes 194 XXVII “The Germans Are Coming!” 201 XXVIII Fast Traveling 207 XXIX The Uhlans! 215 XXX “You Are a Spy!” 221 XXXI Court-martialed 227 XXXII The Long Night 233 XXXIII Through Bullet-Racked Air 243 XXXIV A Flight of Terror 248 XXXV The Bully of the Clouds 254 XXXVI A Mysterious Capture 260 XXXVII The Might of Militarism