valspa on Family Tree Circles

researching this man and his children.
Facts born 1836 Haddington, East Lothian Scotland.Parents John Hogg and Mary Richardson. 1st married Margaret Allen 1857, Fifeshire. Emigrated with wife to Australia. Settled in New South Wales
Margaret death 1859, Pitt Town NSW. Remarries Elizabeth Alice FINN 1865, Maitland, NSW. 4 Children from this marriage...
Elizabeth Cadell HOGG
Mary Marie Alice Maud Hogg
Robert W Hogg
Isabella Doolena HOGG.
I have been able to trace all his daughters, but not his son...
Can you help?
Val S