DROPMORE PAPERS (SERIES II). Vols. CCLXXVIII-CCLXXXII. Political papers of the 1st Lord Camelford, with some earlier and later material; 1722-1798, n.d. Five volumes.
DROPMORE PAPERS (SERIES II). Vols. CCLXXXIII-CCCIII. Estate, financial, legal and personal papers of the 1st Lord and Lady Camelford; 1760-1803, n.d. Twenty-one volumes.
DROPMORE PAPERS (SERIES II). Vols. CCLI, CCLII. Letters of and concerning William Pitt, 1st Earl of Chatham and his wife Hester, to Thomas Pitt and others; 1719-1778, n.d. Quoted in Sir Tresham Lever, op. cit., passim. Two volumes.
DROPMORE PAPERS (SERIES II). Vols. CCLXIV, CCLXV. Letters to Lord and Lady Camelford from George Hardinge, M.P., and his wife Lucy; 1784-1801, n.d. Two volumes.