I am looking for information on the Silver family (sometimes written as Silvers) which migrated from Harford Cty, MD to Ohio.

David Silver (1767 - ?) and his wife Sarah Barnes (1773- 1857)came to Stark sometime after their marriage in 1791. I would like to know when David died and where he and Sarah are buried. I woul also like info on their children. The ones I know about are:
Martha (married Frederick Van Nostran)
John
Archer
David
Ezekiel
Alpheus
However, I think there are two or 3 more children.

I am descended from the Silver family through son Alpheus.
Thanks!
Marian