Hi
I've spent the last few years researching the Thomas Arbuthnot exiles. I know a bit about Thomas Carr.
I don't think Thomas Carr the exile is the same as your Thomas Carr, to be honest. I think he's been mixed up a few times.
Thomas Carr left the Thomas Arbuthnot with work as a groom for Major Newman in Geelong. From there he seems to have headed up to Ballarat, probably looking for gold.
Thomas Carr the exile was convicted of robbery in 1858 in Victoria. At the time, he was in Ballarat and gave the name "William Jones". His prison record shows he was born in Lancashire, which may or may not be true. He said at the time that he had no relatives in the Colony. He wasn't released until 1864.
That doesn't seem to fit with your Thomas Carr.
Thomas Carr the exile seems to have suffered from a fairly severe mental illness later in life, claiming to be a wizard at times. He was sometimes referred to as "the Wizard of the South". He lived around Wangaratta in the 1860s.
As far as I can work out, he died at the Alfred Hospital in Prahran in 1884.
Kind regards
Jill Brewer