Althorp Papers. Vol. mdxxvii. Letters from Frederick Beauchamp Paget Seymour, later Baron Alcester of Alcester, Charlotte Spencer's cousin; 1852-1885, 1894.
Althorp Papers. Vol. mdxxviii. Correspondence with Luke White, 3rd Baron Annaly. Annaly was married to Charlotte Spencer's niece Lilah, daughter of 3rd Viscount Clifden; 1888, 1895-1910, n.d.
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. 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. 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.
Althorp Papers. Vol. mdxxv. 1. Letters from Lily Seymour, wife of Horace Seymour; many undated, but circa 1900-1909. 2. Letters from Freda Biddulph, Charlotte Spencer's niece; 1903-1910.
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.