- 1Chapter I — Ice-Boating on the Bay
- 2Chapter II — Heading for Trouble
- 3Chapter III — A Strange Note
- 4Chapter IV — Holiday Plans
- 5Chapter V — Mr. Hanleigh
- 6Chapter VI — Preparations
- 7Chapter VII — The Other Ice-Boat
- 8Chapter VIII — Suspicious Actions
- 9Chapter IX — Night on Cabin Island
- 10Chapter X — Stolen Supplies
- 11Chapter XI — Postage Stamps
- 12Chapter XII — The Notebook
- 13Chapter XIII — The Cipher
- 14Chapter XIV — Christmas Day
- 15Chapter XV — Chicken Thieves
- 16Chapter XVI — The Chimney
- 17Chapter XVII — The Escape
- 18Chapter XVIII — The Cipher Solved
- 19Chapter XIX — Disappointment
- 20Chapter XX — When Rogues Fall Out
- 21Chapter XXI — A Cry for Help
- 22Chapter XXII — The Letter
- 23Chapter XXIII — The Chimney Collapses
- 24Chapter XXIV — The Discovery
- 25Chapter XXV — Elroy Jefferson Is Pleased
The Mystery of Cabin Island
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