NAME, Oliver Stephen No. 168 Trade, Farm Labr Height without shoes, 5' 5" and a quarter Complexion, Dark Head, Small Hair, Brown Whiskers, Brown Visage, Small Forehead, Low Eyebrows, D. Brown Eyes, D. Grey Nose, M.L. Mouth, Small Chin, M.S. Remarks, Bro mole on rt arm, woman ins same arm
Also, added in a space on the right of the page, it says 'West Wycomb'. This has no heading but I wonder if it is birthplace or residence? If so this perhaps means that this Stephen isn't connected to 'our' Olivers at all.
On the same site you can see another register, CON 18/1/22. Stephen appears in image 114 of 154. Here (for example) it says he was single and that while in Tasmania he spent some time in the stocks as a punishment for being too far away from his master's cart to be in control of the animals.
The prison hulk registers on Ancestry allow you to search by surname plus place of conviction, so I looked for Olivers sentenced in Oxford.
As expected, Joshua & Solomon Oliver appeared in the search results, but so did another Oliver:
Stephen Oliver, aged 27, convicted 1 March 1834, at Oxford, of poaching. This information is from a register for the 'Ganymede' hulk. He was, adds the register, transported to Van Diemen's Land [Tasmania] on 8 May 1834.
Records of transportation to Australia (also on Ancestry) show that he was transported on the 'William Metcalf'. Convict muster lists show that he received a conditional pardon in 1846.
JOJ reveals more about his crime: he and five others entered Lady Stapleton's land at Rotherfield Greys, armed with guns, to destroy game. He first appeared at the Oxford Assizes in July 1833 but was remanded and the case wasn't heard until the Lent Assizes in 1834.
Rotherfield Greys is quite a way from 'our' Olivers' territory, but just in case there is a connection I thought I'd mention this third Oxfordshire Oliver transportee. I don't suppose there was an earlier Stephen Oliver from Stonesfield who disappeared, Shane?