Sargent showed scholastic promise and wrote dramatic poetry on historical themes.
Sargent attended the ministerial meeting to discuss Pitt’s tax proposals, 17 Dec. 1797, and on 22 Dec. secured an exemption for physicians from the increase. He chaired the income tax bill at the committee stage in March 1799. He remained in office in Addington’s ministry and in July 1802 succeeded Addington’s brother as junior secretary to the Treasury. He had been unexpectedly defeated at Queenborough, but Addington found him another seat on Lord de Dunstanville’s interest before the year was out. He steered several ministerial bills through the committee stage, but took no part in debate. Addington was prepared to see him remain in office in Pitt’s second ministry, but he went into opposition with him. Addington then persuaded the King to grant his wife a pension of £616 per annum with reversion to him for his 12 years’ service. He voted against Pitt’s additional force bill in June 1804. In September he was still listed ‘Addington’ but also among the latter’s friends ‘on whom some impression might be made’. He welcomed Addington’s reconciliation with Pitt and was in the ministerial minority against the censure of Melville, 8 Apr. 1805. Subsequently, however, he concurred in his leader’s quarrel with Pitt and was in the majority for Melville’s criminal prosecution, 12 June. In July he was duly listed ‘Sidmouth’ and in November reported as steadfast with him.
Sargent supported the Grenville ministry, which incorporated Sidmouth, voting for their repeal of Pitt’s Additional Force Act, 30 Apr. 1806. He had been a silent Member since leaving office and in July 1806 left the House when Sidmouth procured from Lord Grenville his appointment as auditor of public accounts in exchange for his seat.
