Mystery Names

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Across
  1. 3. World's most famous criminal, according to Chesterton
  2. 4. Pawnbroker with blazing red hair
  3. 6. Encyclopedia copied by Jabez Wilson.
  4. 8. Has a prescription for trintrin.
  5. 9. Notorious criminal and fourth smartest man in London.
  6. 10. What Madame Deroulard did to her son
  7. 12. Assistant to Jabez Wilson with an interest in photography
Down
  1. 1. Creator of Father Brown
  2. 2. Head of the Paris Police
  3. 5. Doctor John; colleague of Sherlock
  4. 7. Asks Poirot to investigate Deroulard's death
  5. 11. Died of "heart failure"