Dsundonald was only 16 years old when he succeeded his elder brother William, who according to his uncle Charles Douglas, 2nd earl of Selkirk [S], was ‘one of the hopefullest youths I ever saw’. The new earl’s situation was not happy: a sickly child, caught in the crossfire of competing family interests. His widowed mother, who had married Charles Hay†, styled Lord Yester (later 3rd marquess of Tweeddale [S]), fretted over him and would not let him live on his own in the ancestral home at Paisley, as his brother had done. She called in the head of her family, her brother James Hamilton, 4th duke of Hamilton [S] (later duke of Brandon), to bolster her demand that Dundonald live in her household.
Guided by Hamilton, Dundonald took part in the election of the Scottish representative peers at Holyrood Abbey on 17 June 1708. He voted for the list agreed by Hamilton with Lord Yester’s friends in the Squadrone, but because he was himself still a minor — 17 days short of his 21st birthday — two members of the court party protested that his votes were invalid.
Dundonald was present again at the peers’ election in 1710, supporting the candidates agreed by the new Tory administration of Robert Harley, later earl of Oxford, with Hamilton, John Erskine, 22nd earl of Mar [S], and John Campbell, 2nd duke of Argyll [S] (earl of Greenwich), a list which included his brother-in-law, Dunmore.
When Dundonald heard that Hamilton had been appointed ambassador to France, he was eager to accompany him, and in late August 1712 wrote to his uncle from Ghent asking him to obtain the necessary permission from the queen.
Dundonald stayed on in Paris, however, until the autumn of 1713, returning to Edinburgh on 6 Oct. 1713 just two days before the election of representative peers. He had sought Oxford’s assistance in advance, as well as that of George Hamilton, earl of Orkney [S]. This, combined with the approval of Argyll, ensured his successful candidacy.
Midway through the session Dundonald was permitted to purchase from the now disgraced Argyll (for the sum of £10,000) the colonelcy of the 4th troop of Horse Guards.
When the Lords met following the queen’s death, on 1 Aug., he was again present, and he attended 80 per cent of sittings until Parliament was prorogued on 25 August. In spite of his reputed Jacobite sympathies, Dundonald remained in office after the accession of George I, not least because his financial health may not have been sound enough to sustain the loss of what was a very substantial investment in his army commission.
Dundonald died suddenly on 5 June 1720, leaving behind a reputation for piety and philanthropy, which he may have taken from his beloved first wife.
