Alexander Irwin, born 1790 died 1883 married, it is said, Matilda Steen at an unknown place and unknown date. Possibly from Londonderry, but I have no certainty as I have been unable to locate any marriage reference in any database.
Apparently Alexander was father of James (1837) William John (1838) Matilda (1840) and Margaret Jane (1843) all from Londonderry. Margaret Jane married James Lindsay May 1871 in Victoria Australia and died 1927 at Atlestane, Healesville, Australia.
Your assistance would be most appreciated.
David