Archdall saw service in the Mediterranean and lost his right arm in Egypt, 18 Mar. 1801, in command of his regiment during an ill-judged charge in which he displayed ‘over-zeal’ and got nothing for it except a medal.
Archdall was thought unlikely to come over from Ireland in the spring of 1804, listed ‘Irish Addington’ in May and, after coming over in June, ‘doubtful Pitt’ in September, though initially ‘Irish Pitt’. He was reckoned ‘pro’ government in December 1804 and ‘doubtful Pitt’ in July 1805. The viceroy reported to Pitt, 1 June 1805, that it was difficult to get Archdall to travel over on Melville’s question: he was disposed to support the minister, but felt obliged not to oppose Melville’s impeachment.
Archdall went on to support the Portland ministry, voting with them from the outset on 25 Mar. and 9 Apr. 1807. It was as a ‘warm supporter’ of government that he solicited and obtained their approbation in another contest at the ensuing general election.
Archdall could be relied on to oppose Catholic relief, as attested by his votes in 1811, 1812, 1813, 1816 and 1817. He would have done so in 1819, had he not been shut out. On 4 July 1815 he was a spokesman for the Orange Order and he was still anti-Catholic in 1829. Peel summed him up in March 1813 as ‘an honourable man but not quite so well satisfied as could be wished. He fancies he has been rather slighted in his profession.’ In May 1814 he applied unsuccessfully to be a trustee of the linen board. In March 1815 Peel described him as ‘a very independent supporter of government—an honourable man gratified with civility and attention, more than by absolute gain—taking offence at the least slight whether intentional or not—and mixing up his whims and caprices with his political friendships in a strange way’. On 17 May he further reported:
as General Archdall expressed himself extremely hurt at the want of attention which he conceived to have been shown to his military claims, and on that ground seemed to intimate an intention of opposing the government in his political capacity, and as I feel perfectly confident that if I inform him that Lord Liverpool declines seeing him there will not be a hope of conciliating him, I have ... informed General Archdall that he can see Lord Liverpool on the subject on Saturday next.
On 3 July 1815, Archdall was in the majority against government on the Duke of Cumberland’s establishment bill, but the government of the Isle of Wight, awarded him on 9 Aug. 1815, seems to have dulcified him for a time. Then on 6 May 1817 he voted against Canning’s Lisbon embassy, and on 13 and Apr. 1818 with opposition on the ducal marriage grants, while on 21 Apr. he supported Shaw’s motion for the repeal of the Irish window tax. Accordingly he was reported ‘out of sorts with the government—thinking he has been neglected’. His wish was evidently to be allowed to retire from his office on half-pay. Ungratified, he voted with opposition on Ridley’s motion, 18 Mar. 1819, against the Irish window tax, 5 May, and against the foreign enlistment bill, 10 June. This time it was his appointment to the linen board that probably pacified him.
