Career
He was a staunch supporter of the Parliamentary side during the English Civil War. He received his knighthood from James I at Salisbury on 20 August 1607. He was re-elected Member of Parliament for Whitchurch in 1628 and sat until 1629, when King Charles decided to rule without parliament.
Jervoise was re-elected Member of Parliament for Whitchurch in April 1640 for the Short Parliament, and again in November 1640 for the Long Parliament.
Jervoise died at the age of 67. Jervoise married Lucy Powlet, daughter of Sir Richard Powlet of Herriard and thereby acquired the Herriard estate and influence in Hampshire.
