Althorp Papers. Vols. clxii, clxiii. Correspondence with Samuel Glasse, D.D., Rector of Wanstead, his wife Hannah, brother John, and son, George Henry Glasse, Rector of Hanwell; [1761?]-1809, n.d. Two volumes.
Althorp Papers. Vols. clxvi-clxxiii. Letters, etc., from and relating to Henry Byne of Newcastle upon Tyne, and Satterleigh House, Devon, and his wives, Mary Ann, née Wade (d. May 1795), and Mary Frances; 1788-1811. Byne, formerly a seaman, was a student and protégé of Poyntz, who lent him money. The correspondence chiefly relates to Byne’s marital and financial difficulties, and recovery of the debts. Eight volumes.
Althorp Papers. Vols. ccxxxix-ccxli. Legal papers, correspondence and accounts of the trustees of the marriage settlement, chiefly relating to the administration of property in Devon, Cornwall and of Croydon manor and rectory; 1738-1824. Partly drafts, abstracts and copies. Three volumes.
Althorp Papers. Vols. ccxxxvi, ccxxxvii. Abstract of the title of W.S. Poyntz and his wife and their trustees to estates in Sussex; circa 1794. Draft and copy, [1819?]. Two volumes.