The Irish peer Murrough Boyle, 1st Viscount Blesington (1685–1718) bought the manor in 1704 and it remained with his hereditary heirs until the death of William Stewart, 1st Earl of Blessington in 1769. In 1778 it was inherited jointly by Thomas Vesey, 1st Viscount de Vesci and Edward Pakenham, 2nd Baron Longford. In 1806 Baron Longford's daughter The Hon. Catherine Pakenham married Arthur Wellesley, who in 1814 was created Duke of Wellington. In 1821 Catherine's brother Thomas Pakenham, 2nd Earl of Longford was created Baron Silchester, but in 1828 he and John, 2nd Viscount de Vesci sold the manor of Silchester to the Duke. In the first decade of the 20th century Arthur Wellesley, 4th Duke of Wellington still owned the manor of Silchester.