Hi Dennis,
I haven't checked this site in a while. I descend from Samuel and I'm in touch with other descendants from Arkansas. That's where David and James migrated. Do you know Barb MacNeil? She lives in San Jose and Columbus is her direct relative. I think her email is barbmacneil@sbcglobal.net. She has more information than I do, but I think everyone is still researching Samuel. I'll let you know if I get lucky!
Take care,
Denise