Conversation so far:
what does mind your p’s and q’s mean
Mind your Ps and Qs is an English language expression meaning mind your manners, mind your language, be on your best behaviour, watch what you're doing.
when did the phrase mind your ps and qss originate
Attempts at explaining the origin of the phrase go back to the mid-19th century.

Question: is the original author known
Self-contained rewrite: is the original author of mind your ps and qs known