 He also held office as Treasurer of the Navy from 1673 until 1681, Lord Commissioner of the Treasury from 15 November 1690 to 2 May 1696 and Comptroller of the Household from 1702 to 1704.He was also responsible for the Habeas Corpus Act 1679.Though able, Seymour's character was marred by his haughty pride in his ancestry (much like his cousin, the 6th Duke of Somerset) and by venality.