Annie Hilliard Tasmania b c1864

I am keen to obtain any information regarding the parents and earlier ancestors of my Great Grandmother - Annie Hilliard. She was born in Hobart, Tasmania about 1864. She married George William Adams at Roxurgh Otago New Zealand in 1890. She died 1910 aged 46. We have no information on her parents. It is believed she was an orphan. Can anyone help with information or likely sources?

Many thanks
Graeme Martyn