Martin was born in Lombard Street, London, where his father was a senior partner in the family banking business of Martin, Stone, and Co., (famous as ‘The Grasshopper’), of which he became a junior partner in 1830.
Upon his father’s death in 1832 Martin inherited freehold property in Herefordshire and became a member of Tewkesbury corporation.
Martin is not known to have spoken in the Commons, served on any select committees or introduced any bills. He generally supported Lord Palmerston’s ministry, backing Lord Hartington’s want of confidence motion in the Derby ministry, 10 June 1859, but not infrequently voted against the government in favour of progressive measures of reform. He supported the ministry over the budget, 24 Feb. 1860, and divided in favour of the paper duties repeal bill, 12 Mar., and the second reading of the Maynooth College bill, 20 July (later opposing a motion to consider the withdrawal of the college’s endowment, 4 June 1861). With regard to electoral reform, he consistently opposed the ballot, 20 Mar. 1860 (and again, 21 June 1864), but divided in favour of widening the franchise for the counties and boroughs, 13 Mar., 10 Apr. 1861. He favoured other progressive measures and, having voted against the continuation of church rates in July 1860, backed Trelawny’s church rates abolition bill, 14 May 1862. He voted against Gladstone’s planned grant for the purchase of the exhibition buildings at Kensington, 2 July 1863, and differed with Palmerston over British policy. Regarding the American Civil War and the dispute between Prussia and Denmark over Schleswig Holstein, he told his constituents in 1865 that he ‘heartily sympathised with the South, and was willing to support the Dane’, but still gave the prime minister credit ‘for keeping clear of a war’ on those questions, and supported the ministry on the vote of censure, 8 July 1864. He also backed the government over the union chargeability bill, 27 Mar. 1865, which he believed would save ratepayers in his constituency ‘something like £400 a year’.
After receiving the backing of his local Liberal Association in November 1864, Martin came forward again for Tewkesbury at the 1865 general election, standing on the strength of his recorded votes in parliament, his promotion of local interests, and the achievements of the Liberal government.
Martin remained a bachelor and lived with his widowed mother at Camden until her death in 1862. After his elder brother John retired from the family bank (now Martin & Co.) in 1875, he became the senior partner, and was in the habit of riding to London to do business, being ‘perhaps, one of the last to keep up this practice’.
