Michael and Frances Ponds SC 1880s

I'm looking for information about my great-great grandparents, Michael and Frances Ponds who lived in Lexington County, SC, Gilbert Hollow Township in 1880.They do not appear in the 1870 census.In 1900 some of the children were in Conway County, AR.Their children were: George, Bascom, Elizabeth (Lizzie), Thomas, Mary, Estelle, and Cromwell.
Alice married Richard BOOZER.Bascom married Ida ARMSTEAD. George married Ida SWAGGERS maybe.Have pictures of Bascom, Thomas, and Cromwell, but not of the others.
Where were they in 1870?Are there relatives still in SC.I've tried websites, written to African American churches (no acknowledgement, talked to family members, looked at SC sites, and someone searched the census records.The PONDS, BOOZERS, EARHARTS, THORNTONS,all seemed to have intermarried in some manner and all came from SC together.Who are my people?