Looking for the Steele and Sisson side of my family tree.

My g-g-g-grandfather was Robert Steele.
Robert was born in Reigate in the UK in 1815
He married in Melbourne Victoria,Australia and had at least 5 children, one of his daughters Caroline Sisson Steele, was my g-g-grandmother.
Robert moved from Australia and settled in Arrowtown in Central Otago where he died in 1895.

Any useful information anyone has who is searching Robert Steele is greatly appricated, esp birth years of his children.