Northumberland County Council, Letters from William Portes (Main Resident Land Steward of Doddington Estate), 1760 Nov – 1762 Aug., 2/DE/20/1/1-29

– Letter from William Portes to Sir John Hussey Delaval, 29 August 1761, 2/DE/20/1/17

– Letter from William Portes to Sir John Hussey Delaval, July 1762, 2/DE/20/1/25

– Personal Letters and Letters to Lady Delaval Re the Administration of the Doddington and Seaton Delaval, NRO 650/D/12

2DE.20/1/1-29: Letters from William Portes 1760–72

2DE.20/2/1-24: Letters from William Portes 1764

2DE.20/3/1-31: Letters from William Portes 1767–8

2DE.20/4/1-28: Letters from William Portes 1769–70

2DE.20/5/1-16: Letters from William Portes 1773

2DE.20/6/1-31: Letters from William Portes 1774–5

2DE.20/7/1-32: Letters from William Portes 1777-8

2DE.20/8/1-30: Letters from William Portes 1779

2DE.20/9/1-30: Letters from William Portes 1780

2DE.20/10/1-27: Letters from William Portes 1781

2DE.20/11/1-38: Letters from William Portes 1782

2DE.20/12/1-37: Letters from William Portes 1783

2DE.20/13/1-33: Letters from William Portes 1784

2DE.20/14/1-29: Letters from William Portes 1785–6

2DE.20/15/1-25: Letters from William Portes 1787–8, 1790

2DE.20/16/1-44: Letters from William Portes 1792–9

2DE.20/17/1-39: Letters from Rev. R. P. Hurton 1752, 1763–87

2DE.21/1/1-43: Accounts & Rentals 1750–90

2DE.21/2/1-68: Accounts & Rentals 1752–1803

2DE.31/1: Inventory Book of Household Furniture in Seaton Delaval Hall 1755

2DE.31/6: Inventory Book of Household Furniture in Seaton Delaval Hall 1801

2DE.31/10: Miscellaneous Household Inventories 1750–95

NRO 650/J/1/1-6: Letters from Ralph Barber 1751–3

NRO 650/J/2: Letters from William Portes 1788–99

NRO 650/J/3/1-5: Letters from other servants 1752–9

NRO 650/J/4: Account of window-tax 1785–8

NRO: 650/J/5/1-2: Account of bills 1788–95

NRO: 650/J/6: Account of expenses 1788–94

NRO: 650/J/7: Account of cash received 1788–94