Althorp Papers. Vol. mdcccxc. Letters from: 1. William Goodall, Superintendent of the Pytchley Hounds, kept at Brixworth Kennels; 1874-1895. 2. William Goddard, rel. to the Brixworth Kennels; 1879-1887.
Althorp Papers. Vols. mdcccxci-mdcccxciii. Correspondence with local M.P.s. mostly relating to local affairs, e.g. County Council, Quarter Sessions, appointment of magistrates, etc., with only limited references to national politics; 1857-1910. See also Northamptonshire Record Office, SOX350, late nineteenth century. Three volumes.
Althorp Papers. Vol. mdcccxcii. Correspondence with Col. Sackville George Sackville of Drayton House, Thrapston, M.P. for N. Northamptonshire (1867-1880); 1880-1909.
Althorp Papers. Vol. mdcccxciii. Correspondence with Francis Allston Channing, Baron Channing of Wellingborough; M.P. for E. Northamptonshire (1885-1910), J. P. for Northamptonshire (1886-1910); 1886-1910.
Althorp Papers. Vols. mdcccxciv-mdcccxcviii. Correspondence with H. P. Markham, solicitor; Clerk of the Peace, co. Northant., also a number of letters by his son and assistant, Christopher, later Deputy Clerk of the Peace and Deputy Clerk of the County Council; 1856-1910. Partly printed. Five volumes.