Master was from ‘an old Gloucestershire gentry family’ which had originated in Kent. The eldest of nine children of a retired army officer and a gentleman usher of the privy chamber, 1808-68, who had inherited an estate of more than 7,000 acres at Knole Park, near Bristol, from his uncle in 1823,
His paternal uncles having represented Cirencester, 1785-92, and Gloucestershire, 1784-96, Master was returned unopposed for the staunchly Conservative borough at the 1837 general election as the successor to Lord Robert Edward Somerset.
At the 1841 general election Master was re-elected unopposed. He supported the amendment to the address which brought down the Whig ministry, 27 Aug. 1841. Master is not known to have spoken in the House, sat on any select committees, or introduced any bills, but proved a reliable supporter of Peel’s ministry, voting for the corn importation bill, which introduced the sliding scale, 9 Mar., 7 Apr. 1842, and dividing consistently in favour of the re-introduction of income tax that session. He opposed a reduction of sugar duties, 3 June, (later dividing against a uniform duty, 3 June 1844), and supported the poor law amendment bill, 27 June 1842. He did, however, divide against Peel over the continuation of the Maynooth grant, 7 Apr. 1843. He opposed motions for committees of the House to consider Irish grievances, 12 July, and investigate the state of that country, 23 Feb. 1844. He was unsympathetic towards factory reform and in the divisions on the factory regulation bill, voted for night to be defined as 8pm to 6pm rather than 6pm to 6am, 18 Mar., and paired in favour of a 12 hour day, 22 Mar. He opposed the motion that there should be no legislative interference in the number of hours of work for adults, 3 May, but voted in favour of allowing 8 year olds to be employed in factories, 6 May. He supported the Dissenters’ chapels bill, 6 June, and paired against a committee of the House to consider Irish Church temporalities, 12 June 1844.
Believing that he could no longer discharge his parliamentary duties ‘in a satisfactory manner … except at a personal inconvenience and sacrifice’, Masters ‘somewhat startled’ his constituents by taking the Chiltern Hundreds, 26 July 1844.
Master died at Knole Park in January 1899 and was buried with ‘the utmost simplicity’ at Almondsbury Church, 3 Feb. 1899.
