- 1Chapter I — The Ominous Warning on Shipboard
- 2Chapter II — The Torpedoed Ship
- 3Chapter III — Prisoners on Board of a Submarine
- 4Chapter IV — The Terrors in the Dark Room of an Undersea Boat
- 5Chapter V — Some of the Mysteries of a Submarine
- 6Chapter VI — Groping Through the English Channel
- 7Chapter VII — Caught in the Deep Sea Nets
- 8Chapter VIII — The Night’s Struggle to Free the Vessel
- 9Chapter IX — The Capture of the Submerged Vessel
- 10Chapter X — The Secret Key to the Bomb Fuse
- 11Chapter XI — Operating the Submarine With a Captive Crew
- 12Chapter XII — The Death Blow to the Submarine
- 13Chapter XIII — The Rescue in the Channel
- 14Chapter XIV — Ten Hours in the Danger Zone
- 15Chapter XV — A Frightful Mine Explosion
The Boy Volunteers with the Submarine Fleet
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