The manuscripts of His Grace the Duke of Buccleuch and Queensberry ... preserved at Drumlanrig castle ..
Great Britain. Royal Commission on Historical Manuscripts; Buccleuch, William Henry Walter Montagu-Douglas-Scott, 6th Duke of, 1831-1914; Queensberry, William Douglas, 1st Duke of, 1637-1695; Fraser, William, Sir, 1816-1898