In 1862 Trevelyan went out as a civil servant to India, where he spent several years. At the general election of 1868 he was returned for the
Hawick Burghs, which he continued to represent until 1886. When the first
Gladstone ministry was formed in December 1868, Trevelyan was appointed
Civil Lord of the Admiralty, but resigned in July 1870 on a point of conscience connected with the government Education Bill. He advocated a sweeping reform of the army, including the abolition of the purchase of commissions, and both in and out of parliament he was the foremost supporter for many years of the extension of the county franchise. In the session of 1874 he brought forward his Household Franchise (Counties) Bill, which was lost on the second reading – it was not till ten years later that the agricultural labourer was enfranchised. Among other causes which he warmly supported were women's suffrage, a thorough reform of metropolitan local government, and the drastic reform or abolition of the
House of Lords. He was also in favour of the direct veto and other temperance legislation. From November 1884 to June 1885 he was
Chancellor of the Duchy of Lancaster with a seat in the cabinet. In February 1886 he became
Secretary for Scotland and vice-president of the Scottish Education Department in Gladstone's third administration, but resigned in March over
Irish Home Rule. The same year he succeeded his father in the baronetcy. From 1892 to 1895 he was again Secretary for Scotland and vice-president of the Scottish Education Department. He resigned his seat in parliament in early 1897 and retired into private life. In 1911 he was appointed a member of the
Order of Merit. ==Writings==