Here are two pages from the Henderson Directories that verify not only where John Barker resided in 1947 but also his place of employment as of 1952
Difficult to read here, but you can find and save these pages for yourself by going to
Which is the search for John's employer during those years -- Erzinger
Or do further searches looking for the Names Barker in the searchable Henderson Directories that are available online.
Henderson Directories - U of Alberta Peel's Prairie Provinces