Pierrepont’s ancestors acquired Holme, four-and-a-half miles from Nottingham, under Edward I, and regularly represented the county from 1417.
According to Charles Godall, who wrote a biography of him in the early eighteenth century, Pierrepont was ‘from his youth always much addicted to books’ and ‘never was delighted with those pleasures and recreations that almost all young noblemen and gentlemen affect; but all was swallowed in study’.
Pierrepont was prosecuted in Star Chamber at the instance of William Noye* for an assault in the cloisters of Westminster Abbey during the Ascension Day service in 1632. But after the victim had spent £600 in legal expenses, Pierrepont received a free pardon.
Pierrepont was a royalist during the Civil War and, after succeeding his father as 2nd earl of Kingston in 1643, was created marquess of Dorchester as a reward for his loyalty. By then the parliamentarians had sequestered his estate, and in 1647 he was ordered to compound for his delinquency in the sum of £7,467. However, his parliamentarian brother William† arranged to have the fine assigned to himself as compensation for his losses during the war.
During the Interregnum Pierrepont practiced as a lawyer and a physician. In 1659 he quarrelled with his son-in-law John Manners†, Lord Roos, who wrote to him, ‘if by your threatening to ram your sword down my throat, you do not mean your pills ... I am safe enough’.
