Althorp Papers. Vol. md. Letters from his sister, Lady Sarah Spencer. For Spencer's letters to Sarah see Add. MSS 77720-77722 below; 1851, [1856?]-1910.
Althorp Papers. Vol. mdviii. Letters from: 1. His uncle, George Spencer, known as Father Ignatius, Superior of the Order of Passionists in London; 1858-1863. 2. His aunt Frances, Dowager Lady Clinton; 1851-1872, n.d.
Althorp Papers. Vol. mdxviii. 1. Correspondence with Henrietta Lyttelton, wife of Spencer Lyttelton; 1868-1909, n.d. 2. Letters from William Henry Lyttelton, son of Spencer and Henrietta Lyttelton; 1867-1876. Hampton Court, Middlesex: Admissions to copyhold tenure: 1662-1708: Partly Lat.
Althorp Papers. Vol. mdxxvi. Correspondence with Lord Charles Bruce, husband of Charlotte Spencer's sister Augusta and librarian at Althorp; 1861-[1904?]. Thomas Coke, Vice-Chamberlain: Appointments as Deputy Lieutenant of Derbyshire: 1700-1715.
Althorp Papers. Vol. mdxxi. 1. Letters from Eliza Seymour (Lilah), sister of Charlotte Spencer; 1859-1893. In 1861 she married Henry, 2nd Viscount Clifden (d. 1866), and in 1875 Sir Walter George Stirling. 2. Correspondence with Sir Walter George Stirling; 1869-1909. Thomas Coke, Vice-Chamber...
Althorp Papers. Vol. mdxx. Letters from Lady Lucy Cavendish, (nee Lyttelton), sister of Charles George, 5th Baron Lyttelton and widow of Lord Frederick Cavendish, including a copy of a letter from Lord Spencer and one undated letter signed Lucy Cavendish; 1882-1910. Thomas Coke, Vice-Chamberlai...
Althorp Papers. Vol. mdxii. Letters from: — 1. Spencer's cousin Lavinia Jane Watson, daughter of Lord George Quin, wife of Richard Watson, M.P., relating to family affairs; [1852?]-1870, 1880-1885, n.d. 2. George Lewis Watson of Rockingham Castle, Northampton, son of Lavinia Jane Watson, mainl...