PORTLAND PAPERS. Vol. CCCLI (29/13). Bonds and other papers relating to Lord Oxford's debts. Accounts: Acconts of 1st Lord Oxford: late 17th cent-circa 1724. Robert Harley, 1st Earl of Oxford: Correspondence and papers: late 17th cent.-1724.
PORTLAND PAPERS. Vol. CXXVIII (29/86{2}). Miscellanea 46. (Letters of Sir Edward Harley to his wife, Abigail). Abigail Harley, 2nd wife of Sir E Harley: Correspondence with her husband: bef. 1688.
PORTLAND PAPERS. Vol. CCCXC (29/102{2}, 103{1}). John Morley, of Halstead; 1712-1718. John Morley, of Halstead, county Essex: Correspondence with 2nd Lord Oxford: 1711-1729, n.d.
PORTLAND PAPERS. Vol. CCCXCI (29/103{1}). 1. John Morley, of Halstead; 1719-1729, n.d. 2. Mot - Peregrine Hyde Osborne, 3rd Duke of Leeds. John Morley, of Halstead, county Essex: Correspondence with 2nd Lord Oxford: 1711-1729, n.d.
Vol. CLXXXIV (29/45Q). Vol. 61: United Provinces (letters of M. D. van Vrijbergen, Dutch Envoy in London). Marinus Dibbout van Vrijbergen, Dutch envoy in London: Letters to 1st Lord Oxford, etc.,: 1704-1711, n.d.