James Longman was of Woolwich, Ontario, west of Guelph. If only I knew his parents, but I couldn't find them.
It may seem likely that there weren't any BIRTH AND MARRIAGE RECORDS in Wellington County before 1860. I also e-mailed the Wellington site for help.
I also couldn't find visual evidence (a death certificate) of Samuel Longman. He died in 1855 in the Wellington area.