Looking for Cfifford Seymour of Nsw Australia

My mate Colin Seymour ask for my help to find out about his mum and dad.
He was brought up by his uncle Eric seymour.He know nothing about his parents.
I found out that Clifford seymour and Kathleen minnie woodbridge marriaged in 1955 in Moree,Nsw,australia.
Clifford was killed in an truck smash around 1972.