Althorp Papers. Vol. dcxci. Letters from William Stephen Poyntz (1769-1840), cousin and M.P.; 1784-1830. William Stephen Poyntz, of Cowdray Park and Midgham: Letters to Lord Spencer: 1784-1830.
Althorp Papers. Vol. cdlv. Unbound. 330 x 230 mm. 1. Subscriptions to charitable institutions; 1771-1775. Partly printed and engraved. 2. Books and stationery; 1772-1774. Partly printed. 3. Music and the tuning and repairing musical instruments; 1771-1775.
Althorp Papers. Vol. cclxii. Rentals, inventories, valuations and accounts relating to the settlement of the estate of the 7th Viscount Montagu, and his widow, Frances, née Mackworth; 1777-1814. Anthony Joseph Browne, 7th Viscount Montagu: Letters and papers of and rel. to: 1754-1814.
Althorp Papers. Vol. cdlxvi. Unbound. 340 x 210. 1. Repair and maintenance of the house, outbuildings, garden and park at Althorp; 1771-1775. 2. Repair and maintenance of the houses leased by Lord Spencer at Farming Woods and Pytchley, co. Northant.; 1771-1775.