Thomas CRAIG the Colonel is well documented. You need to check the DAR Patriot index/indices, and maybe anything on distinguished Pennsylvanians of the Rev War. IIRC, Isaac served in both the Marines (!) and the "army" artillery, and after the War settled in greater Pittsburgh area, prob on bounty land. He is probably also in the DAR index. I have stumbled through info on these two, but do not have copies or cites because they weren't my direct line.