What was the last Sherlock Holmes story by Conan Doyle?

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Tags

1. #detective
2. #final
3. #strand
4. #story
5. #short
6. #magazine
7. #december
8. #first
9. #title
10. #character
11. #conan
12. #adventure
13. #featuring
14. #sherlock
15. #doyle
16. #under
17. #problem
18. #holmes
19. #published
20. #arthur