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| Chapter 1 | My Uncle Makes a Discovery |
| Chapter 2 | The Mysterious Parchment |
| Chapter 3 | An Astounding Discovery |
| Chapter 4 | We Start on the Journey |
| Chapter 5 | First Lessons in Climbing |
| Chapter 6 | Our Voyage to Iceland |
| Chapter 7 | Conversation and Discovery |
| Chapter 8 | Off at Last |
| Chapter 9 | We Meet with adventures |
| Chapter 10 | Traveling in Iceland |
| Chapter 11 | We Reach Mount Sneffels |
| Chapter 12 | The Ascent of Mount Sneffels |
| Chapter 13 | The Shadow of Scartaris |
| Chapter 14 | The Real Journey Commences |
| Chapter 15 | We Continue Our Descent |
| Chapter 16 | The Eastern Tunnel |
| Chapter 17 | Deeper and Deeper |
| Chapter 18 | The Wrong Road! |
| Chapter 19 | A New Route |
| Chapter 20 | A Bitter Disappointment |
| Chapter 21 | Under the Ocean |
| Chapter 22 | Sunday below Ground |
| Chapter 23 | Alone |
| Chapter 24 | Lost! |
| Chapter 25 | The Whispering Gallery |
| Chapter 26 | A Rapid Recovery |
| Chapter 27 | The Central Sea |
| Chapter 28 | Launching the Raft |
| Chapter 29 | On the Waters - A Raft Voyage |
| Chapter 30 | Terrific Saurian Combat |
| Chapter 31 | The Sea Monster |
| Chapter 32 | The Battle of the Elements |
| Chapter 33 | Our Route Reversed |
| Chapter 34 | A Voyage of Discovery |
| Chapter 35 | Discovery upon Discovery |
| Chapter 36 | What Is It? |
| Chapter 37 | The Mysterious Dagger |
| Chapter 38 | No Outlet - Blasting the Rock |
| Chapter 39 | The Explosion and Its Results |
| Chapter 40 | The Ape Gigans |
| Chapter 41 | Hunger |
| Chapter 42 | The Volcanic Shaft |
| Chapter 43 | Daylight at Last |
| Chapter 44 | The Journey Ended |
