Thereafter, a succession of plots and counterplots—the Rising of the North, the plots to liberate Mary Queen of Scots, and the Gunpowder Plot – each claimed a Percy among their adherents. On this account the eighth and ninth Earls spent many years in the Tower, but the tenth Earl, Algernon, fought against King Charles in the Civil War, the male line of the Percy-Louvain house ending with Josceline, the eleventh Earl. The heiress to the vast Percy estates married the Duke of Somerset; and her granddaughter married a Yorkshire knight, Sir Hugh Smithson, who in 1766 was created the first Duke of Northumberland and Earl Percy, and it is their descendants who now represent the famous old house.