Jermyn’s education consisted primarily of foreign travel. He can scarcely have entered his teens when licensed in 1618 to tour the Continent for three years. By early 1623 he was abroad again, this time as a member of the household of the English ambassador to Spain, the earl of Bristol (John Digby*). While there, he failed to recognize his father’s patron, the duke of Buckingham, when the latter arrived unannounced in Madrid to hasten the Spanish Match negotiations. Fortunately the royal favourite was not offended, and a relieved Jermyn’s next letter home ‘abounded in the expression of his joy for the honour and favours done him’ by the duke.
Jermyn first entered Parliament while still under age, sitting for Bodmin in 1625 and 1626 on the interest of his maternal uncle, Sir Robert Killigrew*. His youth and inexperience accounts for his failure to contribute to the Commons’ proceedings in either year.
This medical venture helped set the tone for the following decade, as Jermyn and his brother Thomas exploited their Court connections to secure a series of potentially lucrative joint grants. These included the clerkship of warrants and enrolments in Common Pleas, and the Exchequer clerkship of the Pipe. However, all these posts were held in reversion, and Jermyn apparently received no benefit from any of them until after the Restoration, when he finally became joint registrar of Chancery.
Jermyn sat for Corfe Castle in the Short Parliament, but seems not to have sought a Commons’ seat in the following autumn. His prominent role in the First Army Plot of 1641 identified him as a diehard foe of the parliamentarian leadership, and after the outbreak of the Civil War he was consistently excluded from peace negotiations. Raised to the peerage as Lord Jermyn of Bury St. Edmunds in 1643, he became the queen’s chamberlain early in the following year, and accompanied her into exile a few months later, running her household in France. Their increasingly intimate relationship during the Interregnum prompted widespread gossip that he had secretly married her after Charles I’s execution.
