Sorry I can't help you but I wonder if we may be related. My Mum's husband was Raymond Earl Davidson originally from Grafton in NSW I think. They married in Brisbane Queensland and moved to Bribie Island. I think they separated around 1955. The only research I have done so far indicates Ray died in March 1971 in Sydney. He and Mum never divorced.
They had a son Edward James Davidson, born 18 February 1945 who currently lives in Brisbane. Eddie had one son Ricky James Wallace whose current whereabouts is not known to me.