This the earliest record I’ve found for my great-great-grandfather in Canada. He was born in Scotland in the early 1830s and was still living there for the 1841 Scotland Census.
Norman McKenzie – 1861 Census, Prince Edward island, Canada
Occupation teacher, 2 married people in household plus 2 females under the age of 6 and one 7-16, religion “Kirk of Scotland”.
Library and Archives Canada; Ottawa, Ontario, Canada; Census Returns For 1861; Roll: M-898