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. mdv. Letters from Margaret (nee Baring), wife of Charles Robert Spencer, and their children, including some by Albert Edward John (Jack), later 7th Earl Spencer; 1883, 1899-1910.
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. mdix. Letters from: 1. His aunt, Isabella, Marchionness of Exeter; 1851-1874. 2. Brownlow Cecil, 2nd Marquess of Exeter and husband of Lady Isabella. Includes a copy of a reply from Spencer; 1851, 1860-1866.
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...
Althorp Papers. Vol. mdxiii. Letters from: — 1. His aunt, Lady Sarah Lyttelton, wife of William Henry, 3rd Baron Lyttelton and daughter of George John, 2nd Earl Spencer; 1851-1868. 2. His cousin, Caroline Lavinia Lyttelton; 1851-1881.
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. mdxix. 1. Letters from Charles George, 5th Baron Lyttelton and 8th Viscount Cobham. Includes copies of occasional replies by Lord Spencer; [circa 1863], [1875?]-1889. 2. Letters from Neville Gerald Lyttelton, brother of Charles George, 5th Baron Lyttelton; [circa 1874]-1908.