Mary Harriet Jackson

I am seeking information on my great-great-grandmother Mary Harriet Jackson who was born in Greenville, South Carolina on 8-22-1808. Jackson is her maiden name. She married my great-great- grandfather Daniel Ballew and they settled in Murray County, Georgia. She died there in 1886 and is buried at Mount Harmon Church Cemetery (Ball Ground Cemetery ). I am seeking information on her parents, which would be my great-great-great-grandparents,so that I can go farther in my family tree. Any help would be appreciated.    Cindy58