Hi Dundee,
I know that Rosa came to Australia 15th March 1859 arrived in Melbourne.
within the 1st year here she was pregnant with twins born 1861 died 1861.Phoebe came along in 1864.
She married James in 1883 what happened in between time who knows. On Phoebe marriage cert it says New Zealand , maybe that was what she was told. I think maybe she was aborigine.
Chezza