I'm a descendant of William Richardson of Marion,S.C.. My grandfather Arny King Richardson 2/17/1886-6/25/1959 married to my grandmother Lizzie Jane Todd 1901,Arny's father James P. Richardson 4/1849 of S.C. and married Rebecca(Rebecka) Cribb born 5/1851 in N.C.. For James Richardson do a search for The Battle of Atlanta, also the book "History of Marion County",there's a lot of information on our family. My mother was Pauline Richardson 3/25/1940-10/22/1969 and married a Bobby E. McManus 9/08/1938-4/28/2010.Hope this information helps. I did see William and John in the census in Roanoke,Va.Also go to Familysearch.com and sign up to be an indexer and you can search the census there.
Good Luck and God Bless
Hilda Gail McManus 4/09/1961-Conway,S.C. living in Baltimore,MD