Why are bathrooms called John's?

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Tags

1. #derive
2. #called
3. #thought
4. #popularized
5. #toilet
6. #device
7. #later
8. #however
9. #itself
10. #flushing
11. #around
12. #actual
13. #installed
14. #found
15. #today
16. #sometimes
17. #harrington
18. #queen
19. #least