Paulet’s ancestors acquired the manor of Basing through marriage in 1428. His great-great-grandfather, the 1st marquess of Winchester, for whom the ancient barony of St. John of Basing was revived, served as lord treasurer from 1550 to 1572, and greatly enlarged the partially fortified Basing House. This remained the family’s official seat until the mid-seventeenth century. However, Paulet’s father the 4th marquess, who inherited substantial debts and a long-running battle with his illegitimate siblings over the Paulet estates, demolished one section of Basing House to save on costs, and moved to Hackwood House, a nearby park lodge. One of England’s highest-ranking noblemen, but also a leading Catholic, the 4th marquess took little part in public life.
Paulet could rely on nomination by his own father for a burgess-ship at St. Ives in 1621. Given his comparative youth, experience of the Commons was probably intended as a stage in his education, though he presumably showed interest in a bill then in Parliament which partly concerned the dowry of his elder brother’s wife.
For the 1624 Parliament Paulet was summoned to the Upper House as Lord St. John, attracting attention by his opposition to a bill reviving anti-Catholic legislation. Around the same time he began to take part in local government, but his own recusancy and marriages with Catholics doubtless helped to exclude him from the most significant roles, even after he succeeded to the marquessate in 1629. His next significant foray into public affairs was not until 1640, when he joined Charles I at York during the Second Bishops’ War, becoming his regular chess partner; a jest during one game about the trouble which the king was having with his bishops failed to provoke mirth.
