6Chapter 6: Rescuing Mr. Petrofsky
19Chapter 19: Lost In A Salt Mine
7Chapter 7: The Air Glider
20Chapter 20: The Escape
8Chapter 8: In A Great Gale
21Chapter 21: The Rescue
9Chapter 9: The Spies
22Chapter 22: In The Hurricane
10Chapter 10: Off In The Airship
23Chapter 23: The Lost Mine
11Chapter 11: A Storm At Sea
24Chapter 24: The Leaking Tanks
12Chapter 12: An Accident
25Chapter 25: Homeward Bound—Conclusion
13Chapter 13: Seeking A Quarrel
