This is my own follow-up to correct an error. (If Tappan Adney can make them, so can I!) In my previous posting, I skipped a generation. The sequence is Thomas (of Virginia) - Thomas (of Tennessee) - Charles. It was Charles, not Thomas, who had the eight children, the seventh of which was Elizabeth, who married William Sloan and had four children, the last of which was Mary M. Sloan, who married George Henry Harvey.
I apologize for this confusion...I shouldn't do this stuff after midnight.