I haven't been able to find much on Thornton Thompson, who married Elizabeth Wann. What kind of information do you have on him?
I know their tombstones at Silver Island are in bad shape though. There is a pretty elaborate tomb area for the Thompsons there, fenced in by concrete. You can see in Elizabeth Wann-Thompspon's tombstone photo, hers is inside that concrete fenced-in area, but it has been detached from its base. Now I regret not getting photos of the rest of the Thompsons in that cemetery. I live in Texas so it's not like I can cruise back to Fountain County anytime soon.