Great News and thanks to the new Australian archive sites provided, I found one record of great interest regarding my ancestor George Westbury. It was in NSW State Records in the 'Index to Convict Exiles, 1846-1850' I came across my ancestor listed as George Westbury -aged 24 (on arrival in Australia) and identified by the ship, place, date of trial and charge- and then under 'Remarks'....."Recommended for conditional pardon". I also learned under a generic heading that most who served their term, or were pardoned were re-settled in Port Philip, NSW.
This explains why the information is under NSW State Records because -as remarked on previously - the state of Victoria was only officially recognised in 1853. I wonder what earned him the recommendation and doubt will ever find out but it was nice to learn it happened relatively early on in his sentence.