Hi
I've finally found my information. Not sure she will be yours, but she couldn't have been far away, although she already has one ,arrisge to her name!
All I know is Catherine Clarke, formerly O'Neal aged 18, had a son Robert Claridge Clarke on 22 October, 1865 in Trewalla (Tuwalla?) District of Portland, Australia. He was the first child, father born adelaide, aged 23. They had been married 23 Jan 1865 in Truwalla?
Catherine says she was born in Tip[perary, Ireland.
She must have been very close to your family, or a cousin if she's not your Catherine, as she was born Tipperary and ended up near Portland, Victoria!
I hope it's useful.
Best wishes
Emms