From my offline resources

including those based on earlier research through NSW Archives pre Ancestry and other commercial family history websites

November 1828 William HITCHINS
September 1825 William HUTCHINSON
September 1824 William HUTCHINS
May 1824 William HUTCHINS
September 1822 William HUTCHINSON
September 1821 William HUTCHINS
William HUTCHINS, 27 years of age, born Lymington, HAM, England, Indoor Servant, 5 ft 6 in tall, Dark sallow Complexion, Dark Hair, Hazel Eyes, Trial at Surry Quarter Sessions 9 Jan 1821, 7 year sentence, arrived per Adamant 8 Sept 1821. Certificate of Freedom issued 1828, #379.
Try NSW Col Sec papers under those various spellings

my research at that earlier time may not have concentrated on the individual, but have been more about the administrative processes and how they changed under different governorships ...
http://colsec.records.nsw.gov.au/JM