Thankyou for getting back to me. On the marriage certificate of John Davis(aged 31) and Mary anne Harrison. They were married in Sale, Victoria in 1863 and it states that he was born in Hobart town and his parents were Mary Russel and Isaac Davis(profession unknown).
I have already applied for John`s birth certificate, but their isn`t one.
I have come to a bit of a dead end and don`t know where to go from here.