Re James McCallum and Elizabeth Atcherley
They are found on the 1851 census of Canada in East Oxford Township, Oxford County, Ontario. James is a farmer, married, age 47 giving him a birth year of abt 1805 born Scotland. Religion Free Church. Elizabeth is age 53, giving her a birth year of abt 1799, born England. Religion Plymouth Brethren
Note ages are at next birthday, and Elizabeth is born in England not Scotland.
You could also check the LDS Pedigree Resource file.
I am researching the complete Atcherley family and have James and Elizabeth in my strays file and am unable to attach them to the main tree at this time. The Atcherley family mainly comes from Shropshire.