The Knoxes of Northland House (later known as Dungannon Park), originally descended from a Glasgow merchant family, took up residence at Dungannon in the seventeenth century and provided several of its representatives in the Irish Parliament. One of these, Thomas Knox (1729-1818), who was granted the Irish peerages of Baron Welles in 1781 and Viscount Northland in 1791, became a ministerialist representative peer in 1801. His Grenvillite Whig heir, another Thomas (1754-1840), who sat for county Tyrone before and after the Union, succeeded as 2nd Viscount Northland and eventually secured the United Kingdom barony and Irish earldom of Ranfurly. He, who had his father’s Orange sympathies, was one of the instigators of the Dungannon yeomanry, which was claimed as the blueprint of the system established nationally in the 1790s. Of his brothers, three sat in Parliament, two became bishops and another shared his valuable Irish sinecure of prothonotary of common pleas. Of his four sons, Edmond Sexton Pery Knox became an admiral and the other three, including his eldest son and namesake, were Members in this period.
Like Thomas and John James, John Henry Knox, whose army career apparently ended after he was wounded at the battle of Burgos, was a burgess of Dungannon, Northland’s proprietary borough. However, he owed his return to Parliament not to his father, but to his father-in-law, Lord Kilmorey, who controlled Newry. At the general election of 1826, when his brother-in-law Lord Newry retired, he was elected after rowdy proceedings but, in the end, without a contest. Admittedly, he had had to promise to forward the town’s expanding commercial interests, but in this his constituents were to be well rewarded.
Listed by ministers among their ‘friends’, Knox voted in their minority on the civil list, 15 Nov. 1830. He divided against the second reading of the Grey ministry’s reform bill, 22 Mar. 1831, explaining in a letter to his disgruntled constituents that he favoured the redistribution of seats from rotten boroughs to large towns, but objected to the ‘unicornation’ of those in schedule B. Contrary to usual parliamentary practice, he claimed that in voting against the second reading he was not opposing the principle of the bill, and extricated himself by insisting that he would now defend the measure in committee. He duly voted with government against Gascoyne’s wrecking amendment, which precipitated a dissolution, 19 Apr. With his position in Newry only just intact, he stood as a reformer and beat a local radical in a fierce contest, after repeatedly having to justify his conduct on the hustings. He missed his celebratory dinner through illness, 18 May, when he was again toasted as a ‘hardworking’ Member.
With other members of his family he resigned on 5 Sept. 1832 from the corporation of Dungannon, where the representation remained in the hands of his brother at the general election in December.
