Seymour’s father, an army officer and long-serving Member, was a younger son of the 1st marquess of Hertford, and Seymour owed his advancement in life to his aristocratic connections. After a false start in the navy, he entered the army, and was described by Harriette Wilson (erroneously as to his parentage) as ‘a gay, dashing son of Lord Somebody Seymour, of the 10th Hussars, whom everybody knows and few care much about’. Reputedly one of the strongest officers in the forces, he was said to have slain more men than anyone else at Waterloo. He received several promotions in 1815, including apparently one to the rank of lieutenant-colonel, as he was always thereafter known as ‘Colonel’ Seymour.
in St. George’s [Hanover Square] at half past seven by owl light, the bridegroom having had half an hour to pass with the verger waiting for the rest of the company who likewise were waiting for the principal performer, the bishop of Gloucester, he being locked in the House of Lords for a division.
Williams Wynn Corresp. 208.
That month, no doubt through his uncle, the 2nd marquess of Hertford, the lord chamberlain, and his wife, the regent’s mistress, Seymour was appointed a gentleman usher of the privy chamber. He joined the half-pay list the following year.
Brought in by Hertford for his pocket borough of Lisburn in February 1819, Seymour was an inactive supporter of the Liverpool administration, like his brother Hugh, who represented county Antrim on the Hertford interest from 1818 until his death in 1821.
Seymour voted against abolition of the house tax, 10 Mar., repeal of the Foreign Enlistment Act, 16 Apr., reform of the Scottish representative system, 2 June, and inquiry into chancery administration, 5 June 1823. He divided against alteration of the representation of Edinburgh, 26 Feb., and inquiry into the trial of the Methodist missionary John Smith in Demerara, 11 June 1824. He voted for the Irish unlawful societies bill, 15, 25 Feb., and against the Irish franchise bill, 26 Apr. 1825. As he had, 28 Feb. 1821 and (pairing) 30 Apr. 1822, he divided against Catholic relief, 1 Mar., 21 Apr.; enticed away by Hertford’s hospitality, he paired (probably with Croker) in this sense, 10 May 1825.
Following the death of his wife in January, Seymour was given leave from the House for two weeks, 12 Feb., and for a further month, 10 Apr. 1827. In February Hertford applied to the duke of Wellington, the commander-in-chief, for a posting for Seymour, but nothing came of a plan whereby Hertford would pay off his debts in order to allow him to purchase a full-pay commission.
as to myself, if I can muster strength to obtain two or three favours, not more than one Member of Parliament commonly gets, I shall not grumble, but I shall preserve my independence, which I will not barter for a favour to Horace S.C. (for whom I want none now) - nor does he; for the family doubt whether I have influence enough over him to get him down to the House of Commons and I have no fancy for a Bodmin re-election.
Add. 60288, f. 13.
He was probably the ‘H. Seymour’ who voted against repeal of the Test Acts, 26 Feb., and he again divided against Catholic relief, 12 May 1828.
In February 1829 Seymour confided to Hertford that he had hopes of marrying one of the Misses FitzClarence, but having bluntly told her father, the duke of Clarence, that his prospects were ‘none’, he needed a life interest of £1,000 a year; whether or not this was forthcoming, no marriage took place.
Seymour voted against the second reading of the Grey ministry’s reform bill, 22 Mar. 1831, after which he was dismissed from his household position.
According to Lady Bedingfeld, who had it directly from him, Seymour
was left early an orphan, the sister and brothers were taken by different relations; his uncle, Lord Hertford, took him, and he was put in the army, and went young to India; he served all the war, he is now a widower with three children, a fine figure and handsome but a rather coarse, muddled complexion.
Jerningham Letters, ii. 395.
Seymour, who returned to the Commons as a Conservative in 1841, died intestate at Brighton in November 1851.
