Seneca Plantation Clemson University Libraries Also known as Ravenel Mansion; home of Henry Edmund Ravenel - who bought the property in 1855 - and Selina Eliza Porcher Ravenel. Located in Oconee County across the river valley from Fort Hill at the time this photograph was taken. On back: The Ravenel Mansion; [Seneca Plantation]; [from the book Ravenel Records: A History and Genealogy of the Huguenot Family of Ravenel...by Henry Edmund Ravenel]