PAGE Foreword 9 CHAPTERS 1. "Them Mouses Is Extraverted!" 17 2. A Creeping Thing! 23 3. A "Sound" Clue 29 4. An Electrical Trap 38 5. What Electricity Could Not Catch 44 6. A Weird Story 52 7. Science to the Rescue 60 8. Basketball and Brains 66 9. The Voice in the Silence 72 10. A Defeat for Science! 78 11. A Puzzling Thump 84 12. Detective Roger 90 13. Scientist Roger 97 14. Captive Roger 102 15. In the Lamasery 107 16. The Image Speaks 113 17. Black Silence 117 18. A Letter Roger Had Not Sent 121 19. Disquieting Deductions 127 20. Ghost Voices 131 21. Tragedy! 137 22. What Happened to the Eye of Om 143 23. The Acid Test 147 24. An Impossible Camera "Shot" 151 25. Score One for the Mystery Wizard 154 26. Roger Lists His Clues 159 27. A "Thermal" Trick 166 28. The Fuse 172 29. A Surprising Capture 176 30. The Voiceless Warning 184 31. The Hidden Menace 188 32. Science Fights Craft 191 33. A New Suspicion 195 34. Tragedy Strikes Again 201 35. The Stalking Terror 206 36. A Law of Nature 212 37. Revelation! 217 38. The Vigil 223 39. The Ape and the Kangaroo 227 40. The Mystery Wizard's Solution 235 41. Man and Beast 241 42. Closing Time 246