Althorp Papers. Vols. mdi-mdiv. Letters from his half brother, Charles Robert Spencer, (Bobbie), later 6th Earl Spencer. For Spencer's letters to him, see R1-R9; 1866-1910. Four volumes.
Althorp Papers. Vols. mdvi, mdvii. Correspondence with his half sister Victoria (Va) and her husband William, 2nd Baron Sandhurst. Most of the letters are written by Sandhurst; 1866-1910. Two volumes.
Althorp Papers. Vols. mdx, mdxi. Letters from Spencer's cousin, William Alleyne Cecil, firstly as Lord Burghley, then from 1867 as 3rd Marquess of Exeter. Also included are copies of occasional replies by Spencer; 1857-1889. Two volumes.
Althorp Papers. Vols. mdxvi, mdxvii. Correspondence with and relating to Spencer Lyttelton, brother of George William, 4th Baron Lyttelton. Many of the letters and accompanying papers relate to family attempts to extricate Spencer Lyttelton from financial and other troubles; 1857-1889. Two volumes.
Althorp Papers. Vols. mdxxiii, mdxxiv. Correspondence with Horace Seymour, brother of Charlotte Spencer. For letters to Spencer from Seymour in his capacity as private secretary to Gladstone see below; 1863-1901. Two volumes.
Althorp Papers. Vols. mdxxx-mdxxxii. Correspondence with Queen Victoria, including a few letters written by officials on the Queen's behalf; 1871-1897. Spencer's letters are drafts or copies. For the original index see KS464. Three volumes.
Scope & Content:
Victoria of England: Correspondence with 5th Earl Spencer: 1871-1897, n.d.
Althorp Papers. Vols. mdxxxiii, mdxxxv. Correspondence with Sir Henry Ponsonby, Private Secretary to Queen Victoria, many on behalf of the Queen; 1868-1892.
Scope & Content:
Major-General Sir Henry Frederick Ponsonby, GCB; private Secretary to Qu. Victoria: Correspondence with 5th Earl Spencer: 1868-1892.
Althorp Papers. Vols. mdxxxvii, mdxxxviii. Correspondence with John Robert Townshend, 1st Earl Sydney, Lord Chamberlain, 1868-1874; 1860-1889, n.d. For the original index see KS504. Two volumes.
Scope & Content:
John Robert Townshend, Earl Sydney: Correspondence with 5th Earl Spencer: 1860-1889, n.d.