I also am a ggg grandchild of Joseph BOYLSTON and Elinor GUPHILL through their daughter Margaret Elizabeth who married Jessee Monroe CLOWER.I suspect you have a great deal more info than I but I am more than willing to share what little I have. From a partial genealogy written by either my aunt or my grandmother: Boylston Family - Charleston, South Carolina: George BOYLSTON m. Polly (?). Their son George BOYLSTON m. Alice CLOUD.Joseph Cloud BOYLSTON m. Elinor Caroline GUPHILL whose maternal grandfather was James Covington JONES who married Elizabeth LAFAYETTE.Paternal grandparents were Zachariah and Margaret GUPHILL. I have other info indicating that the grandfather of Joseph Cloud Boylston is William B (1732, Va.) married to Joanna Austin (Fredericksburg, Va). I have not documented any of the above info except for that concerning Margaret Elizabeth being the child of Joseph and Einor.