(I. ff. 146). 20 Nov. 1753-10 Oct. 1755. includes: ff. 1-24 Thomas Pelham-Holles, Duke of Newcastle 1715; formerly Pelham; Secretary of State: Correspondence with Sir J. Yorke: 1752-1765.: Copies.
(IV. ff. 21). 3-14 Feb. 1758. includes: ff. 8-13 William Henry Nassau de Zuylestein, 4th Earl of Rochford: Correspondence with Lord Stormont: 1768-1771. ff. 10, 12, 13 David Murray, 2nd Earl of Mansfield: Letters to Lord Rochford: 1770.: Copies.