Thanks for that, you have been a great help (everyone on these boards).
My mothers grandfather was adopted.
My mum is Margaret Irene Carr b 18/09/1940 who married Leslie Llewellyn Hopwood b. 04/04/1933.
Her mother was Irene Matilda Simpson(s) b. 1914 and she married John Finlay Carr.
Irene Matilda Simpson was the daughter of Sarah Simpkin(s) and David Charles Simpson who was adopted.
All were born in Melbourne, around the Hawthorn/Auburn area.
I have looked into this before but gave up when it came to David Charles Simpson. I was told he was a ward of the state and that he had spent time in Kew Cottages when he was young. I came up with 2 sets of adoptive parents somehow and no birth certificate.