Lefroy followed his father, a distinguished lawyer who was appointed Irish first serjeant in 1822, to Trinity, but unlike him and his younger brother Thomas, he never practised law. In April 1827 Daniel O’Connell* reported that Lefroy’s father, who had been ‘most actively canvassing the College’ for himself, had ‘announced his son for Dublin city for the next vacancy on the strongest Orange principles’.
He was listed by the Irish agent Pierce Mahoney as ‘neutral’, by ministers as one of the ‘moderate Ultras’ and by Henry Brougham* as anti-ministerial, and he voted against government on the civil list, 15 Nov. 1830. He presented petitions for the abolition of slavery, 16 Nov., 2, 21 Dec. In his maiden speech, 6 Dec., he protested that a Longford petition for repeal of the Union was unrepresentative and contended that Ireland had a much better chance of relief from distress under a united Parliament. He defended the Kildare Place Society against an attack by O’Connell, observing that it educated ‘upwards of 120,000 children of Catholic and Protestant parents’ and was ‘better calculated to benefit the people ... than any other in existence’, 10 Dec. 1830, and objected to a hostile petition from Waterford, 16 Feb. 1831. He insisted that the recorder of Dublin Frederick Shaw had ‘performed all the duties of his office and discharged all the prisoners remaining for trial’ before attending as Member for Dublin, 20 Dec. 1830. He defended the conduct of the archbishop of Dublin in making a return of Irish church livings, 17 Feb. 1831. His subsequent speeches were not always clearly distinguished in the parliamentary reports from those of his father, who arrived from Ireland later that month, but it was probably he who presented a petition in support of the Kildare Place Society and called for the London coal bill to ‘be extended to the coalmeters of Dublin’, 16 Mar., and insisted that the landed proprietors of Ireland had ‘done their utmost to relieve’ distress, 18 Mar. Like his father he divided against the second reading of the Grey ministry’s English reform bill, 22 Mar., and for Gascoyne’s wrecking amendment, 19 Apr. 1831.
At the ensuing general election he offered again, denouncing the bill as a ‘traitorous conspiracy’, but professing to favour ‘such constitutional measures’ as would ‘strengthen and purify the representation’. He was returned in second place after a three-day poll.
Lefroy was absent from the division on the second reading of the revised reform bill, 17 Dec. 1831, but voted against the enfranchisement of Tower Hamlets, 28 Feb., and the third reading, 22 Mar. 1832. He divided against the second reading of the Irish bill, 25 May, which he argued would not ‘give peace to the country’, 14 June, and was in the minority of 39 for preserving the voting rights of Irish freemen, 2 July. He presented petitions against the new plan of Irish education, 5, 19 Mar., when he warned that Protestants would not permit ‘national education to be made subservient to a Popish priesthood’, and promised to oppose steadily ‘a plan so unscriptural’, 5 June. He presented and endorsed further hostile petitions, 20 June, 2 July, and voted against the grant for Irish education, 23 July. He insisted that the payment of Irish tithes should be enforced, accused ministers of advancing money to pay ‘a legal debt owed by the people of Ireland to the clergy’, and complained that since taking office they had ‘exercised their influence to the prejudice of Protestant institutions and in a way insulting to Protestant feelings’, 30 Mar. He was in his father’s minority of 13 against Crampton’s amendment to the arrears of Irish tithes bill, 9 Apr. He had no doubt that a breach of privilege had been committed by the newspaper responsible for publishing the report of the tithes committee, but believed that the Irish secretary Smith Stanley was wrong to prosecute this case when he had ignored others, 31 May. Greville later recorded a conversation about the ‘views of the Protestants’ and ‘the Lefroys’ on tithes, in which Lord John Russell* had stated that they
begin to admit the necessity of change ... and were willing where there was a large parish consisting entirely of Catholics that the tithes should be taken from the rector of such parish and given to one who had a large Protestant flock, an arrangement which would disgust the Catholics ... and be considered a perfect mockery.Greville Mems. ii. 310.
In a speech in which he denied using the ‘tone or language attributed’ to him by Henry Grattan, 14 June, he complained that the party processions bill did not extend to anti-tithe meetings, which ‘too frequently cause the shedding of blood’, but prevented ‘processions of the Orangemen’ who ‘meet as loyal subjects to support the laws and constitution of the country’. He spoke in similar terms, 25 June, when he voted against the measure, and 29 June. Either he or his father divided against a tax on absentee landlords to provide permanent provision for the Irish poor, 19 June. He voted for Baring’s bill to exclude insolvent debtors from Parliament, 27 June. He presented Protestant petitions from county Longford for repeal of Catholic emancipation, 6 July. He voted against ministers on the Russian-Dutch loan, 12 July, but divided for their Irish tithes composition bill the following day and 1 Aug. It was probably his father who was a minority teller against the bill to disqualify the recorder of Dublin from Parliament, 24 July 1832.
At the 1832 general election he was defeated for county Longford as a Conservative, but was seated on petition the following year. He was re-elected in second place in 1835, defeated in 1837 and 1841, reseated on petition the following year, and lost his seat in 1847. He came in for Dublin University in 1858 and sat until his retirement in 1870. Lefroy died at Carrickglass in January 1890.
