Ripley Family with Percy Family at Alnwick Castle, by Rinzler, Ralph, 1982, Smithsonian Archives - History Div, Hugh Algernon Percy (10th Duke of Northumberland), Secretary S. Dillon Ripley, Mary Livingston Ripley, the Earl Percy, Elizabeth Percy (Duchess of Northumberland), Jeffrey LaRiche, Christopher Addison, Sylvia Ripley Addison and Lord James Percy at Alnwick Castle, principal residence of James Smithson's father, Hugh Smithson, first Duke of Northumberland..