What-do-you-know I cannot find the census page.This was a census from Lanarkshire around Glasgow.A lone Burnfield aged 21 working @ a cork factory.Perhaps this young man was working there whilst awaiting to emmigrate.
I found the following two entries from a fiche frm the IGI which I had copied.
Alexander Burnfield married Elizabeth Speed 31 Dec 1869 in Perth, Perth.
They had a daughter Agnes Waterson Burnfield b. 23 Jul 1873 Perth, Perth.
My email is firstname.lastname@example.org
I presume the Campbelltown you are mentioning is in Ontario.
The marriage cert of Alex/Speed will give you Alexander's parents.