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| 1. | The place where the first murder was comitted. |
| 2. | The self-confessed murderer and a salesman who visited the victims shortly before their murders. His initials are A.B.C. (3 words) |
| 5. | The fourth and final murder happened here. |
| 6. | The genre of this book. (2 words) |
| 7. | The brother of the third victim. But was that all he was? (2 words) |
| 10. | Before each victim died, they bought a pair of these from a door-to-door salesman. |
| 12. | The little, Belgian detective with and egg-shaped head and a moustache. (2 words) |
| 13. | The sister of the second victim. (2 words) |
| 15. | This man is always one step behind the Belgian detective. (3 words) |
| 17. | The attractive secretary to the third victim. (2 words) |
| 19. | The third victims profession. |
| 20. | The second victim was called _ _ _ _ _ _ _ _ _ _ _ _. (2 words) |
| 22. | The third murder occured in this city. |
| 24. | The self-confessed murderer suffers from this. |
| 26. | The town where the second murder had taken place. |