Agar was returned to the
Irish House of Commons for both
Gowran and
County Kilkenny in 1783, but chose to sit for the latter, a seat he held until 1789, when he succeeded his father in the Irish viscountcy and entered the
Irish House of Lords. In 1785 he became the final
sinecure holder of the office of Clerk of the
Irish Privy Council, which title after his death was given to his deputies. In 1793 he was elected to the
British House of Commons as one of two representatives for
Heytesbury. He succeeded his great-uncle Lord Mendip as second Baron Mendip in 1802 according to a special remainder in the
letters patent. This was an English peerage and forced him to resign from the House of Commons and enter the
House of Lords. Two years later he assumed by Royal licence the surname of Ellis in lieu of Agar. ==Family==