Amazing people have done fabulous research into burials of convicts. Check out this free website : http://www.hawkesbury.net.au/claimaconvict/
Claim a convict. Claimed a few myself. Those bio’s are mostly entered by descendants. As you can see the researchers, Brian and Toni, have claimed the convict, great grandfather most likely.
I found eight Theobalds on there, haven't claimed any because I don't think any are mine, mind you if I was to follow all the ancestor siblings who knows? I won't be doing that though.