I am searching for connections with William Robertson of Laurens Co, South Carolina. Birth could be in 1750s, son David married Mary Mitchell(father John) . Chlidren of David/Mary were Richardson, Jane, Nancy(Rosson), Henry(Hellums), Willis, Harwood Goodwin. From SC to GA, ALA< MISS< ARK< TX. Need to find Wiliam in Laurens Co. and further back to original immigrant.