Doctor Who Showed That Cholera Was Waterborne
This page is the CodyCross answer for the clue below from Past and Present Tech, Group 1453, Puzzle 5 (Dot Matrix Printer).
Question is: Doctor Who Showed That Cholera Was Waterborne
and the answer is: JOHNSNOW
Word Meaning:
JOHN — (slang, US) A prostitute's client.
Definitions from Wiktionary.