Ok curiosity being what it is I'll ask about Thomas.
If the last you can find of Thomas for certain is the trial in 1843 why are you following him as I assume you cannot be a descendant of his or indeed of his siblings as we haven't exactly identified the right family for them either. I ask as the answer to that could provide an alternative suggestion as where to look to him maybe
Going back to the trial and the pardon I am not sure exactly what papers you have seen. I know you say there was mention in the Newcastle Courant but have you actually seen any court papers. The reason I ask this is I had an ancestor who was up before the court and to cut a long story short when the correct papers were found ( a common name) it was possible to positively identify my ancestor as the correct person as details of his trade, home and wife were all given
