Lady Baltimore by WISTER, Owen

Augustus visits Kings Port, South Carolina, at the request of his Aunt Carola, and at her expense. She wants him to research geneaologies and records to find proof that he is descended from royalty so that he can join her exclusive club, the Colonial Society. While there, he becomes involved in a love affair between John Mayrant and Eliza La Heu. (Summary by Lois Hill)