Roper’s father, one of James II’s Catholic adherents, had fled the country after the 1688 Revolution and died abroad, as did Roper’s two older brothers, John and Christopher, the 6th and 7th Barons. Like the rest of his family, the new Baron Teynham was a Catholic and it is presumed that he spent much of his youth abroad, although evidence of this is scanty. By 1704 he seems to have been back in England because Narcissus Luttrell‡ recorded a rumour of his impending marriage to Lady Barbara Lennard, daughter of Thomas Lennard, earl of Sussex.
Although a parliamentary list of 1708 described him, somewhat surprisingly given his Catholic background, as a Whig, Teynham was unable to take the Test and appears to have been politically inactive at that time. One possible explanation for attaching a Whig label to him may have been his involvement in the disputes over oyster fishing in the Medway area, which pitched him against the interest of the Herbert family, headed by Katherine Herbert, the widowed daughter of Thomas Osborne, duke of Leeds.
In 1716 Teynham conformed to the Church of England. His conversion may well have been because of the anti-Catholic legislation spawned by the Jacobite invasion of 1715 and it is noticeable that a number of other prominent Catholics in Kent and Sussex, including his kinsman Strangford, also took the decision to conform at the same time.
Teynham eventually took his seat in the House towards the end of the 1715–16 session and was present on just over half of the subsequent sitting days. Details of his post-1715 career will be found in the next phase of this work. On 16 May 1723 Teynham shot and killed himself in his house in the Haymarket. The reason for his suicide is not clear, though the Daily Post noted that he had been ‘unfortunately disordered in his senses some days before’ and the coroner’s inquest brought in a verdict of ‘lunacy’.
