A man of ‘extremely liberal’ political sentiments, Protheroe’s enthusiasm for genealogy led him to take a keen interest in the preservation of public records.
From an old Carmarthenshire family, Protheroe’s grandfather, Philip (d. 1803), was a West India merchant and partner in a bank at Bristol, and owned plantations in Nevis and estates in Gloucestershire and Wales.
Declaring himself ‘a strong Whig, inclined to something more than Whiggery’, Protheroe sought re-election at Bristol in 1832.
At the 1835 election he offered for Halifax, where he had family connections through his mother.
Protheroe’s difficult balancing act in appealing to Halifax’s Whigs and Radicals was evident in October 1836, when a joint committee agreed to invite Feargus O’Connor to a dinner for Protheroe and Wood. After pressure from the Whigs, this decision was reversed, and two separate dinners took place, with Protheroe attending both ‘to plead the dangers of disunity in the reform ranks’.
Protheroe generally divided with Whig ministers, backing them on Canadian policy, 7 Mar. 1838, and Irish poor law and municipal reform. He was not particularly attentive in the division lobbies, voting on 28 out of 104 occasions in the 1841 session, although he rallied to ministers on Peel’s confidence motion, 4 June 1841.
An infrequent speaker in this Parliament, Protheroe did raise an issue which had long been important to him, moving for a return of expenditure on the preservation of public records, 24 Mar. 1840. He had served as a commissioner of public records from March 1831 until William IV’s death.
Re-elected for Halifax in 1841, Protheroe reiterated his support for the ballot, an extended franchise and revision of the corn laws.
Few of his speeches, however, pertained to Halifax, and there were complaints in 1842 that Protheroe ‘seldom or ever gives his constituents a visit except on electioneering purposes’, with many supporters ‘highly displeased’ about his absence from a local Anti-Corn Law League meeting.
There had been hints at the 1841 election that some Halifax Dissenters were dissatisfied with their MPs’ conduct on religious issues, but, unlike Wood, Protheroe was considered ‘squeezable’.
In 1845 Protheroe had inherited estates at Turnwood, Dorset from Lady Mary Hill, which he sold the following year.
Protheroe died unmarried and childless at Eccleston Square, London, in 1852, his health having been ‘severely shattered, and his limbs paralysed’ for the previous three years.
