Chapter IX—An Irate Officer

7

Chapter X—Grace Takes the Sky Route

Chapter XI—Rough Going in Cloudland

Chapter XII—A Leap from the Skies

Chapter XIII—“Captain” Grace Invades Germany

Chapter XIV—A Guest of the Huns

8

Chapter XV—An Interrupted Interview

Chapter XVI—Elfreda Has a Suspicion

Chapter XVII—The Treachery of the Hun

Chapter XVIII—Grace Gets a Clue

Chapter XIX—A Voice and a Face

9

Chapter XX—In a Maze of Mysteries

Chapter XXI—A Mouse in the Trap

Chapter XXII—“Captain” Grace Decides to Act

Chapter XXIII—A Desperate Plot Revealed

Chapter XXIV—The Trap is Sprung

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