Hope you're still reading this forum. I'm a descendant of Andrew Flatt and Andrew Flatt Willson (grandson of Andrew) via my maternal ancestry. My great grandfather, Charles Stoddard Patchen, married Clara Belle Willson; she was one of two daughters of Elizabeth Ann Corwin and Andrew Flatt Willson. Her sister, Anna Willson, married another of my relatives: Charles Lumas Stoddard, my mother's "Uncle Lou." Would really like to hear from you!

I wish I knew for sure where those graves are!