I think Sarah C. Birckhead(way hers was spelled) is the child of Francis and Emily Birckhead. In 1850 Albemarle Co. VA census they had several children; one Sarah 8 yr. In 1860 Albemarle Co. census S. C. is 14. This would be Sarah. I feel she is the one that md Wm Harlow. Margaret Birckhead who md. James Harlow is probably her sister as Francis and Emily had a Margaret. Are James and Wm. brothers?