Emily Mary, wife of Viscount Palmerston and formerly wife of Peter, 5th Earl Cowper, to Lady Holland; 1819-1844. Preceded (51600, ff. 1-105v) by Lord Palmerston to Lady Holland; 1829-1843.
Various drafts by Mackintosh of a summary history of the manor of Kensington from the Norman Conquest, and of Holland House itself from its building until the late eighteenth century.