Chapter 1: My Uncle Makes a Great 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: The Eider-Down Hunter—Off at Last
Chapter 9: Our Start—We Meet with Adventures by the Way
Chapter 10: Traveling in Iceland
Chapter 11: We Reach Mount Sneffels—The "Reykir"
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—The Coal Mine
Chapter 18: The Wrong Road!
Chapter 19: The Western Gallery—A New Route
Chapter 20: Water, Where Is It? 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
Table of Contents
