Descended from the ancient Irish family of O’Duinn, Dunne was born in Dublin, the eldest of five sons of Edward Dunne, a senior British army officer and resident landowner at Brittas, Queen’s County.
Dunne took ‘high honours’ at Trinity College, Dublin, and was said to have received a first class certificate at the Royal Military College, Sandhurst.
While serving as high sheriff of his native county, Dunne was soundly defeated at Portarlington at the 1837 general election.
Though widely regarded as a Whig,
In September 1847 Dunne attended the meeting of the cross-party Irish National Council, convened to discuss the famine crisis.
Dunne was a persistent critic of the Irish poor law. In 1848 he had moved successfully for a debate on the operation of the Irish poor law, gathering support from ‘an overwhelming majority of Irish members’, and in January 1850 argued for the ‘oppressive system’ to be entirely overhauled.
Dunne was returned unopposed at the 1852 general election, and afterwards served on the inquiry into the mapping of Ireland.
Dunne voted for the repeal of advertising duty, 1 July 1853, and that was listed year among the fifty highest attending members, dividing 158 out of 257 times.
A colonel of the Irish militia since 1846, Dunne had ‘much to say on military subjects’ and loomed ‘especially large on the discussion of the army estimates’.
Although Dunne was one of the ‘select circle of … political friends’ who had been entertained by Lord Derby in St. James’s in March 1856, he was still regarded as ‘a sound Whig’. He was defeated in 1857 at Portarlington after a personal disagreement with the patron, who transferred his support to his nephew, Captain Lionel Dawson Damer.
In private life Dunne was said to have been ‘courteous, honourable, and upright’. It was claimed that there was nowhere in Ireland ‘a man so popular amongst all classes and parties’ as he was in Queen’s County, where he was returned unopposed in 1859 with the ‘entire support’ of the Conservative interest.
Dunne continued to defend Irish interests and resisted Richard Spooner’s personal plea to support his anti-Maynooth motion in July 1860.
During the 1860s Dunne continued to criticise Ireland’s fiscal relationship with Great Britain and raised the issue of Irish taxation again, 30 Mar. 1860. He questioned Ireland’s capacity to bear equal taxation with England but was countered by Gladstone, who asserted ‘that there was no real equality of rights and liberties without an equality of taxation’, and that any exemptions granted to Ireland would be ‘nothing more than the note of political depression and degradation’.
Dunne wanted to improve passenger communication between Great Britain and Ireland, and in May 1863 got the House to agree to a select committee on the condition of Holyhead harbour, which he chaired.
Having supported measures of Catholic relief, such as the provision for prison chaplains, Dunne was re-elected for Queen’s County at the top of the poll in 1865, the Irish National League having endorsed his efforts to reduce Ireland’s tax burden.
Dunne remained diligent at Westminster, serving on committees on he laws relating to art unions, the mortality of British troops in China, and introducing, without success, bills to amend the Tramway Acts of 1860 and 1861.
Having been ‘as popular on both sides of the house as any other of the Irish members’, Dunne disappeared from public life for some years after abandoning the contest for Queen’s County at the 1868 general election, when his trenchant opposition to disestablishment, which he believed to have been conceived ‘merely for party purposes’, proved unpopular.
Having been in poor health, Dunne died of dysentery in July 1874 at Brittas House and was buried in the family vault at Kilmainham cemetery. He was succeeded by his brother, Edward Meadows Dunne, a barrister and land agent, who had unsuccessfully contested Queen’s County as a Conservative in 1832.
