CHAPTER TITLES: 1. The Mystery of Mad Mountain; 2. Buried Alive; 3. Flames of Hate; 4. A Fiendish Revenge; 5. The Phantom Rescue; 6. The Puma's Paws; 7. The Masked Pursuer; 8. The Flaming Pit; 9. The House of a Thousand Tortures; 10. Victims of the Sea; 11. The Burning Den; 12. Lashed to the Rocks; 13. Into the Chasm; 14. The Human Bridge; 15. Crashing to Earth; 16. Parachute Perils; 17. The Plunge; 18. Unmasked.