The grandson of the first marquess of Hertford and son of Admiral Hugh Seymour; educated at Harrow, he served in the Peninsular War and was equerry to the Duke of Clarence; he was a Conservative MP for Lisburn (1819-26), Bodmin (1826-32), Midhurst (1841-45), and Antrim (1845-47).

REFERENCES TO Horace Beauchamp Seymour:

Lady Holland to Eleanor Creevey, September 1817 in The Creevey Papers: A Selection from the Correspondence & Diaries of the late Thomas Creevey, M.P. (London: John Murray, 1903)

Thomas Creevey to Elizabeth Ord, 24 March 1831 in The Creevey Papers: A Selection from the Correspondence & Diaries of the late Thomas Creevey, M.P. (London: John Murray, 1903)