Hello Annie I saw your message whilst looking for a James Northam in Australia and thought I may be able to help.
A Charles Northan married Mary E Jones in 1887 at Goulburn NSW Australia. They seem to have had a child Charles in 1888. You can check out this information here. http://www.bdm.nsw.gov.au/cgi-bin/Index/IndexSrch.cgihttp://www.bdm.nsw.gov.au/cgi-bin/Index/IndexSrch.cgi?