Althorp Papers. Vol. mmdclxxv. Bills and receipts for the construction and fitting up of a 'cottage in the wilderness' or dairy at Althorp; 1787. Brington, Northant: Letters, bills, etc., rel. to alterations at Althorp: 1787-1880.
Althorp Papers. Vol. mmdccx. List of books in the Althorp library compiled by C. Bruce. Included are notes on individual books and on the formation of the library; 1875.
Althorp Papers. Vols. mmdccxxxiv a-f. Six copies of the Catalogue of Pictures at Althorp, [compiled by David Morton], privately printed; 1851. The first three copies have the Catalogue of the China at Althorp (1857) bound in. All have MS notes and the first includes photographs of some of the portraits.