Strathavon was again returned for East Grinstead in 1820 on the interest of his aunt, Lady Whitworth, widow of the 3rd duke of Dorset. He continued to support the Liverpool ministry, but was a very lax attender. He voted in defence of ministers’ conduct towards Queen Caroline, 6 Feb., and against Catholic relief, 28 Feb. 1821, 30 Apr. 1822, 25 Apr., 10 May 1825. He paired against mitigation of the punishment for forgery, 23 May 1821. He voted against the abolition of one of the joint- postmasterships, 13 Mar. 1821. He was in the ministerial minorities against inquiry into the prosecution of the Dublin Orange rioters, 22 Apr., and the Scottish juries bill, 20 June 1823. His next recorded vote was for the Irish unlawful societies bill, 25 Feb. 1825. He divided against the Irish franchise bill, 26 Apr. 1825.
In March 1826 Strathavon married Lady Elizabeth Conyngham, the daughter of the king’s mistress. He had first proposed to her in May 1824, according to Mrs. Arbuthnot, who commented: ‘I think they will accept him. He is a very good natured rattle and I think, considering all her adventures, she will be fortunate to end in this manner’.
He was returned again for East Grinstead in 1826 on the interest of the new patrons, Lords de la Warr and Plymouth. He voted against Catholic relief, 6 Mar. 1827, 12 May 1828, and repeal of the Test Acts, 26 Feb. 1828. He was in the Wellington ministry’s majority against reduction of the salary of the lieutenant-general of the ordnance, 4 July 1828. Planta, the patronage secretary, expected him to vote ‘with government’ for their concession of Catholic emancipation in 1829, but he ‘stayed away’ (a report that he had divided in the hostile minority, 6 Mar., was false).
Strathavon’s lukewarm support for reform brought about his political downfall at the 1831 general election, for it alienated the Huntingdonshire Tories while failing to convince the reformers. Rooper wrote to Milton, ‘I am uncharitable enough to think we must attribute his vote on reform to an habitual subserviency to courts and ministers [rather] than to any regard for, or conviction of, the necessity of the measure’.
Lord Strathavon spoke rather violently at the close of poll ... with great bitterness against those who had deserted him, and said that other persons had run away from the fight in other places; but in this county, the freeholders should turn him out, and he would keep the poll open till they did so.
The Times, 10 May 1831.
He finished a distant third, and subsequently retired from public life.
Widowed in 1839, Strathavon remarried five years later. In 1848, on the occasion of Queen Victoria’s visit to Alwyne Castle, the family seat in Scotland, his wife’s half-sister, Lady Charlotte Guest, commented on his father
old Lord Huntly, who has fitted up two rooms and taken up his residence there ... It was a melancholy sight. There in the house of his ancestors, now little more than a ghostly ruin, amidst the fine old property which he has so comparatively wrecked! ... His noble-minded son, struggling himself with poverty, coming up with his beautiful wife from their inn lodgings, to meet there on that almost haunted ground, which he holds only by the sufferance of reigning creditors and trustees. But some day, though the estate be crippled irremediably, it is to be hoped it will revive under Lord Aboyne’s good rule and brave exertions.
Letters of Lady Charlotte Guest ed. Lord Bessborough, 219-20.
He succeeded to the marquessate in 1853 and died in September 1863, leaving his wife pregnant with their 14th child. He was succeeded in the peerage by his eldest son Charles Gordon (1847-1937).
