My Great grandfather was John Watts Mercer and his wife was Martha J. Anderson. I think Johns mother was named Samantha and his dad Jobe (Job). Ggrandpa was born in Batesville, O. I did get a copy of his Civil War record but have not had time for that eitherr.
Unfortunately I have not gotten past them as yet. Mom died in Nov. 2000 and we have been trying to settle things in Fl. so have not been able to do genealogy as I would like. If I find out any thing regarding your family will let you know.
Last year I went to High Hill, Ohio,(Chandlersville, O.) address now and photographed tombstones of many Mercer's namely Charles and family. This is in the Ark Springs Baptist Cemetery, High Hill, O.