MP for Bossiney in 1776, succeeding his elder brother Lord Mount Stuart, who had been created Baron Cardiff. Stuart continued an MP for the remainder of his life, except the years 1794–1796, but showed little interest in politics. In 1792, on the death of his father, he inherited the estate of Highcliffe House in Hampshire. With the opening of hostilities against France by the First Coalition, he returned to active service. On 23 May 1794, he took command of the army in Corsica, and supervised the taking of Calvi (the action in which Horatio Nelson lost an eye). Colonel John Moore was at the time his adjutant general. Stuart was promoted to lieutenant-general for this action, and on 24 October 1794, was made colonel of the 68th Regiment of Foot. However, his pride and violent temper led him to quarrel with Lord Hood, commanding the Mediterranean Fleet, and with the civilian viceroy of Corsica, Sir Gilbert Elliot, Bt. His partiality for Pasquale Paoli against Elliot, and other conflicts, led Stuart to resign in February 1795. On 25 March 1795, he left the colonelcy of the 68th for that of the 26th Regiment of Foot, which he held for the remainder of his life. Defence of Portugal He took command of a force sent to Portugal in January 1797 to defend Lisbon, and was notably successful in instilling discipline and spirit into the force, which was partly foreign in composition. Capture of Menorca In 1798, he was sent to attack Menorca (historically called "Minorca" by the British) with 3,000 men, an appointment heartily approved by Lord St Vincent, who praised Stuart as an excellent general and inspiring leader of troops. Though unequipped with siege artillery, he successfully dissimulated and bluffed the Spaniards into surrendering the island without loss of life, an exploit for which he was made a Knight of the Bath. From 15 November 1798 until 1800, he served as the British governor of the island. In March 1799, he responded to an appeal by Admiral Nelson (who, like St Vincent, thought him an excellent leader), and brought the 30th and 89th Regiments under Colonel Blayney to Palermo, from whence they were dispatched to secure Messina against French invasion. Death and memorials In April 1800 he resigned as governor of Menorca and returned to England. He was then offered the post of Commander-in-Chief, Ireland, but died at his home in