Conversation so far:
When did Guy Carleton, 1st Baron Dorchester become Governor of Quebec?
After James Murray resigned his position, Carleton was appointed Captain General and Governor-in-Chief on 12 April 1768.
Was Guy Carleton, 1st Baron Dorchester Governor of Quebec before his appointment in 1768?
On 7 April 1766, Carleton was named acting Lieutenant Governor of Quebec.

Question: how long was he governor?
Self-contained rewrite: How long was Guy Carleton, 1st Baron Dorchester Governor of Quebec?