Althorp Papers. Vol. mmdxlviii. Letters to Lady Clinton from her stepson, Charles Seymour; 1852-1854. For letters from Lady Clinton to Charles see Add. MS 77854.
Althorp Papers. Vol. mmdlxx. 1. Letters to Beauchamp from his brother Charles; 1828-1854, n.d. For Beauchamp's letters to Charles see Add. MS 77853. 2. Letters to Beauchamp from his sister Adelaide; 1841-1877. For Beauchamp's letters to Adelaide see Add. MS 77888.
Althorp Papers. Vol. mmdlxxiii. 1. Letters to Beauchamp from the Prince of Wales; 1869-1894, n.d. 2. Letters to Beauchamp from Admiral Sir Anthony Hoskins relating to the naval action in Egypt; July-Sept. 1882, n.d. 3. Letters to Beauchamp from Admiral Sir F. Sullivan relating to the naval ac...
Althorp Papers. Vol. mmdlxxxiv. 1. Letters and associated papers addressed to Beauchamp Seymour as Commander of H.M. Steam Sloop Cormorant; 1845-1847. 2. Beauchamp Seymour's account of his passage home with H.M.S. Cormorant through the Straits of Magellan; 1847.
Althorp Papers. Vol. mmdlxxxv. Letters and papers, mostly from Frere (solicitor), also two from Lord Spencer, relating to the East Molesey estate, Surrey; 1875-1876.
Althorp Papers. Vol. mmdxcii. 1. Letters to Adelaide from her father Horace; 1840-1851. For Adelaide's letters to Horace Seymour, see Add. MS 77854. 2. Letters to Adelaide from other correspondents, including two written by Adelaide; 1844-1860, n.d.