He succeeded his cousin, the eighth duke, in 1799, and is said to have taken more interest in horse-racing than politics.

REFERENCES TO Archibald Hamilton, ninth duke of Hamilton:

Samuel Rogers to Henry Rogers, 30 September 1812 in Samuel Rogers and his Contemporaries 2 Vols (London: Smith, Elder & Co., 1889)

Thomas Creevey to Elizabeth Ord, 17 August 1820 in The Creevey Papers: A Selection from the Correspondence & Diaries of the late Thomas Creevey, M.P. (London: John Murray, 1903)

Maria Copley to Thomas Creevey, 6 March 1823 in The Creevey Papers: A Selection from the Correspondence & Diaries of the late Thomas Creevey, M.P. (London: John Murray, 1903)