The heir to a substantial, if dissipated, East Anglian inheritance, Jermyn’s family were distinguished both as prominent courtiers and Members of the Commons. One of his forebears had sat for the county in 1584, but it was really with the accession of the Stuarts that the Jermyns came into their own. Jermyn’s father and grandfather held court office and sat for Bury St Edmunds in the Long Parliament but it was to his uncle, Henry Jermyn, created Baron Jermyn in 1643 and earl of St Albans in 1660, that Jermyn was indebted for his elevation to the peerage.
Jermyn’s father had accompanied the king to Oxford at the opening of the Civil War and later retreated to France, where he remained until 1648 when he began the lengthy process of reconciliation with Parliament. Already heavily indebted, Thomas Jermyn senior was fined £2,800 (later reduced to £2,750) by the committee for compounding in January 1651.
Following the Restoration, Jermyn was rewarded with minor office, in 1660 taking up the post of lieutenant governor of Jersey where his uncle, now promoted in the peerage as earl of St Albans, was absentee governor. On the death of St Albans in January 1684, Jermyn succeeded to the barony of Jermyn of St Edmundsbury by virtue of a special remainder, and in July he was appointed to the governorship of Jersey (a post to which the Jermyns had held the reversion for a number of years). St Albans’ death posed Jermyn and his brother Henry with considerable problems, for while the earl had left a substantial personal estate (estimated at over £60,000) he had left even greater debts, reckoned to exceed £65,000.
Some of my friends, upon an accident lately happened to my wife and mother, have (unbeknown to me) moved for my leave to come over. This I have received, but thinking it was desired at an improper time, choose to lose this opportunity of seeing them rather than not be here to expect his Majesty’s commands.
Putting aside concerns for his wife and mother’s condition, Jermyn preferred to delay his return to coincide with the sitting of the new Parliament and instead took the opportunity of reporting the ‘great demonstration of joy and allegiance’ with which the king’s proclamation had been greeted on the island.
Jermyn took his seat in the House at the opening of the new Parliament on 19 May 1685 after which he attended approximately 67 per cent of all sitting days. He was named to the sessional committees for privileges and petitions on 22 May, and to a further 12 committees before the summer adjournment. He was assessed as a likely supporter of the bill introdu ced by William George Richard Stanley, 9th earl of Derby, to secure the restoration of estates that had been sold during the Interregnum.
Despite his apparently wavering attitude to the king’s policies, on the news of the expected Dutch invasion, Jermyn was among the first to offer his services to King James.
Following the king’s flight, he joined the peers who assembled at the Guildhall on 11 Dec. when he signed the declaration to the Prince of Orange and subscribed the orders constituting Robert Lucas, 3rd Baron Lucas, governor of the Tower, and commanding George Legge, Baron Dartmouth, to dismiss all Catholic officers from their commands in the fleet.
Jermyn’s diligent attendance in the session was reflected in the high number of committees to which he was named. Added to the sessional committee for the Journal on 17 May, he was named to a further 29 committees in the course of the session. On 31 May he voted in favour of reversing the perjury judgments against Titus Oates, and on 15 June he was one of the peers named to the committee for drawing up an address to the king for seeing to the fortification of, among other places, Jersey. Speaking in a committee of the whole on the matter of the address, Jermyn outlined the supplies and reinforcements he thought necessary for the island’s defence, emphasizing that in its present state, ‘the island is not to be kept against 3,000 men, nor the castle without provision.’
Jermyn’s careful balancing act between acceptance of the new regime and continued involvement with his brother’s affairs was threatened in July by a local dispute over the nomination to the living at his brother’s manor of Cheveley in Cambridgeshire. On his brother’s behalf, Jermyn nominated Thomas Warren to succeed the former incumbent, Hugh Lloyd, precipitating a challenge from two churchwardens who accused Warren of Catholic tendencies and of having been present at mass with Dover.
In advance of the new session, Jermyn responded to the request for a self-assessment of his personal estate, wishing ‘it were such a one as might contribute to their majesties’ service’ but regretting that much of what he had was encumbered by annuities. Even so, he acknowledged a personal estate of £2,000 and submitted himself ‘to the judgment of the Lords commissioners and if the £2,000 aforementioned be to be paid, notwithstanding the annuities I pay, upon the first notice it shall be willingly complied with.’
Taking his seat in the new Parliament on 21 Mar. 1690, Jermyn was nominated to the sessional committees for privileges, petitions and the journal and to a further 15 committees in the course of the session, of which he attended almost 93 per cent of all sitting days. On 8 Apr. he subscribed the protest at the resolution to pass the bill recognizing William and Mary as rightful and lawful sovereigns, and two days later he protested again at the resolution to expunge the reasons for the former protest from the Journal.
The shade of Jermyn’s exiled brother made its presence felt again in September when Dover appealed to Jermyn (and others) to make use of their interest to procure his return to England. Jermyn professed great pleasure at his brother’s resolution and promised to use ‘all the interest I have to effect it’. He sent a copy of his brother’s letter to Daniel Finch, 2nd earl of Nottingham, in order to be advised of ‘the method of proceeding.’
Jermyn took his seat for the 1691-2 session on 10 Nov. when he was nominated to the committee considering Stydolph’s bill. Named to a further seven committees in the session, he was present for a little over 42 per cent of all sitting days. On 23 Feb. 1692 he entered his protest at the resolution to pass the supply bill. The same day he entered a further protest at the resolution to make an entry in the Journal concerning the Commons’ addition to the bill of a clause establishing a commission of accounts.
With the threat of French invasion looming, Jermyn was ordered back to Jersey in April; he remained there for less than six months before petitioning for leave to return to England.
Jermyn’s continuing association with his brother gave rise to doubts about his suitability for the Jersey posting and during the summer complaints were raised about his government of the island. These ranged from misgivings about his overly friendly behaviour to French captives to specific charges against his officials, notably his secretary and the lieutenant governor, Edward Harris, who was described as being ‘almost always in bed’ and guilty of keeping up ‘open communications with France.’
Although Jermyn was again granted leave to return to England in September 1694 for the forthcoming session of Parliament, he was absent at its opening and excused at a call on 26 November.
While attending the lord mayor of London’s procession through the city on 28 Oct. 1697, and in spite of an order of 13 Oct. of the mayor and aldermen charging the beadles to arrest anyone involved in such activities, Jermyn was struck by a ‘squib’ hurled from the crowd.
Jermyn took his seat in the first (1698-9) session of the new Parliament on 29 Nov. 1698, after which he was present on approximately half of all sitting days. In December he suffered a further bereavement with the death of his daughter, Henrietta Maria Bond.
Jermyn was estimated as being in favour of the occasional conformity bill in January 1703, but he played no further part in the House’s affairs. Reports of his death began to circulate from the end of March; he died at his house in Westminster on 1 April.
