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1. By the
Light of the Study Lamp
2. The
Secret at Lone Tree Cottage
3. In
the Shadow of the Tower
4. A Three-Cornered Mystery
5. The Secret at the Hermitage
6. The
Circle of Footprints
7. The
Mystery of the Locked Room
8. The
Clue in the Cobweb
9. The
Secret at the Gatehouse
10. The
Mysterious Fireplace
11. The Clue
of the Rusty Key
12. The
Portrait in the Sand
13. The Secret
in the Old Well
14. The Clue
in the Ivy
15. The Secret
of the Jade Ring
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16. The
Mystery at the Crossroads
17. The Ghost
in the Gallery
18. The Clue
of the Black Flower
19. The
Winking Ruby Mystery
20. The Secret
of the Swiss Chalet
21. The
Haunted Lagoon
22. The
Mystery of the Bamboo Bird
23. The Sierra
Gold Mystery
24. The Secret
of Lost Lake
25. The
Mystery of the Stone Tiger
26. The Riddle
of the Frozen Fountain
27. The Secret
of the Silver Dolphin
28. The
Mystery of the Wax Queen
29. The Secret
of the Minstrel's Guitar
30. The
Phantom Surfer
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