The younger sister of the Duchess of Devonshire; in 1780 she married Frederick Ponsonby, third earl of Bessborough; Lady Caroline Lamb was their daughter.

REFERENCES TO Henrietta Frances Ponsonby, countess of Bessborough [née Spencer]:

Duchess of Devonshire to Lady Melbourne, [Janury 1802] in In Whig Society 1775-1818: Compiled from the hitherto unpublished Correspondence of Elizabeth, Viscountess Melbourne, and Emily Lamb, Countess Cowper, afterwards Viscountess Palmerston (London: Hodder and Stoughton LTD., 1921)

Duchess of Devonshire to Lady Melbourne, [24 November 1802] in In Whig Society 1775-1818: Compiled from the hitherto unpublished Correspondence of Elizabeth, Viscountess Melbourne, and Emily Lamb, Countess Cowper, afterwards Viscountess Palmerston (London: Hodder and Stoughton LTD., 1921)

Mrs. J. H. Peterson to Lady Melbourne, [August 1812] in In Whig Society 1775-1818: Compiled from the hitherto unpublished Correspondence of Elizabeth, Viscountess Melbourne, and Emily Lamb, Countess Cowper, afterwards Viscountess Palmerston (London: Hodder and Stoughton LTD., 1921)

Lord Byron to Lady Caroline Lamb, [August? 1812] in Lady Morgan’s Memoirs: Autobiography, Diaries and Correspondence. Second Edition, Revised 2 vols (London: Wm. H. Allen & Co., 1863)

Lady Melbourne to Lord Byron, 7 July 1813 in In Whig Society 1775-1818: Compiled from the hitherto unpublished Correspondence of Elizabeth, Viscountess Melbourne, and Emily Lamb, Countess Cowper, afterwards Viscountess Palmerston (London: Hodder and Stoughton LTD., 1921)

Duchess of Beaufort to Lady Hollad, 8 July 1813 in In Whig Society 1775-1818: Compiled from the hitherto unpublished Correspondence of Elizabeth, Viscountess Melbourne, and Emily Lamb, Countess Cowper, afterwards Viscountess Palmerston (London: Hodder and Stoughton LTD., 1921)

Lady Holland to Eleanor Creevey, 21 May 1816 in The Creevey Papers: A Selection from the Correspondence & Diaries of the late Thomas Creevey, M.P. (London: John Murray, 1903)

Samuel Rogers to Sarah Rogers, 11 November 1821 in Samuel Rogers and his Contemporaries 2 Vols (London: Smith, Elder & Co., 1889)

Lady Caroline Lamb to Lady Morgan, September 1823 in Lady Morgan’s Memoirs: Autobiography, Diaries and Correspondence. Second Edition, Revised 2 vols (London: Wm. H. Allen & Co., 1863)

Lady Caroline Lamb to Lady Morgan, [June 1825?] in Lady Morgan’s Memoirs: Autobiography, Diaries and Correspondence. Second Edition, Revised 2 vols (London: Wm. H. Allen & Co., 1863)

Lady Caroline Lamb to Lady Morgan, 2 June [1825] in Lady Morgan’s Memoirs: Autobiography, Diaries and Correspondence. Second Edition, Revised 2 vols (London: Wm. H. Allen & Co., 1863)

Lady Caroline Lamb to Lady Morgan, [November 1825?] in Lady Morgan’s Memoirs: Autobiography, Diaries and Correspondence. Second Edition, Revised 2 vols (London: Wm. H. Allen & Co., 1863)

Sydney Smith to Henry Howard, 28 August 1828 in A Memoir of the Reverend Sydney Smith. By his Daughter, Lady Holland. With a Selection from his Letters, edited by Mrs. Austin 2 vols (London: Longman, Brown, Green, and Longmans, 1855)