Henry Jermyn’s career is inextricably linked with that of his master, York, whom he served as master of horse from the years of exile through to 1673, when he was disabled because of his religion. On York’s accession as James II, Jermyn was one of those to benefit from the new regime, but although he joined his king in exile at the Revolution, he was quick to seek reconciliation with the new government of William and Mary.
The younger son of an established Suffolk family, Jermyn appears early on to have been taken under the wing of his courtier uncle, also named Henry Jermyn, later earl of St Albans. Jermyn joined the court in exile at some point in the 1650s, and it was presumably during this period that he converted to Catholicism. By 1656 he was a member of York’s household and by 1659 serving as master of horse to the duke at a salary of £400 p.a. As such, Jermyn was part of the group closely associated with York that included John Berkeley, later Baron Berkeley of Stratton, and his nephew Charles Berkeley, later earl of Falmouth.
Jermyn accompanied his master back to England at the Restoration. Following the revelations of York’s secret marriage to Anne Hyde, Jermyn was prominent among those eager to persuade the duke to renounce the relationship. He even went so far as to claim to have been one of the duchess’ many lovers. In December 1660 he was at the centre of another potential royal scandal, when it was rumoured that he had married his supposed former mistress, the Princess Royal.
Jermyn’s rakish behaviour continued throughout the 1660s. In 1662 he and another member of York’s household, Colonel Giles Rawlings, fought a duel with Thomas Howard (possibly Hon. Thomas Howard‡) and Colonel Dillon (younger son of Thomas Dillon, Viscount Dillon [I]). The affray, in which Rawlings was killed, had supposedly arisen out of a quarrel over the notorious countess of Shrewsbury.
Jermyn was forced to resign his offices as a result of the Test Act in 1673. Two years later he married the daughter of one of his Suffolk neighbours, a lucrative match that brought with it £8,000 from the bride’s uncle, William Crofts, Baron Crofts, while St Albans undertook to settle a further £7,000 p.a. on his nephew. The Poleys’ only reservation was Jermyn’s catholicism, but despite their stipulation that he should promise not to convert their daughter and a report that Jermyn ‘being a great bigot’ had refused to make the undertaking, the match went ahead.
Following the accession of James II, Jermyn was created Baron Dover (one of three members of James’ circle to be ennobled at that time) and appointed to the council of the queen dowager (Catharine of Braganza).
By the end of 1686 Dover was said to be in league with Tyrconnel and Sunderland against Laurence Hyde, earl of Rochester. When Rochester was displaced as lord treasurer shortly after, Dover was one of those appointed to the new treasury commission.
Active in Cambridge and in Suffolk in the winter of 1687, recommending potential members for the anticipated Parliament (though with little success), Dover was again included among the Catholics in a third assessment of likely attitudes to repeal of the Test in January 1688.
Dover was in London towards the end of November 1688, when he announced the news of the defection of Prince George, of Denmark (later duke of Cumberland), and others to the Prince of Orange.
The king’s flight in the early hours of 11 Dec. caused a number of his close advisors, Dover among them, ‘to complain most bitterly of him that has betrayed them and utterly ruined them in that he gave them no notice neither to provide for the security of their persons nor for any part of their estates.’
In July 1689 Dover was at last promoted earl of Dover by the exiled king, although his new honour was not recognized in England.
Following the failure of the Commons’ attainder bill, Dover was indicted as a rebel at the Old Bailey in October 1689.
I know this is no time for a poor private man to be thought on, but really I am brought to such a pass, that I am forced to speak untimely as it is. I write to my Lord [Sidney Henry Sydney, Viscount Sydney, later earl of Romney] pray help me with him if you can … you helped me out of England, he out of Ireland … both together get me thither again, though it be to the Tower and from thence to the scaffold, it will be more friendly to help me to die there than to let me beg for bread here.
Add. 61363, ff. 7-8.
Dover’s prayer was answered. In October he was pardoned and given leave to return to England, though he was not immediately restored to possession of his estate.
Despite his prominent association with James II’s regime and reduced circumstances, Dover retained considerable interest, and in January 1695 it was suggested that a motion in the Commons for excusing recusants from paying double taxes who had taken an oath of fidelity had been ‘set on foot’ by Dover’s friends.
In 1703 he succeeded his brother as 3rd Baron Jermyn, thereby finally reuniting the Jermyn lands with St Albans’ property (comprising much of Queen Henrietta Maria’s former possessions), which had been divided between the brothers at St Albans’ death. Noted as a Jacobite in an analysis of the peerage in relation to the succession in or about April 1705, on 21 Jan. 1707, 22 years after having first been elevated to the peerage, Dover was listed for the first time as attending the Lords. His extraordinary appearance elicited no comment in the Lords Journal. Why he chose to attend the House at this point is uncertain. It is similarly unclear whether he submitted to taking the oaths in order to do so.
On 1 Apr. 1708 (the fifth anniversary of his succession to his brother’s barony) he attended the House for a second time. Once more, no comment was made. Five days later, he died at his house at Cheveley. In the absence of any children of his own, he directed that his considerable wealth be distributed among his many great-nieces (of which there were at least 13), making bequests in excess of £26,700. He was buried at the Carmelite priory in Bruges.
