Maberly stood for Northampton at the general election of 1820, having continued to cultivate the borough since his aborted attempt on it in 1818. In the view of Lord Althorp* he showed ‘great skill’ in throwing all the ‘odium’ of his own unpaid bills on Lord Compton, the sitting Member, whom he relegated to third place after a lively contest.
He participated in the parliamentary campaign in support of Queen Caroline, to whom he had presented the Northampton loyal address, 1 Dec. 1820, at the opening of the 1821 session, though he was a little less pertinacious than his father. He endorsed his constituents’ petition for restoration of her name to the liturgy, 1 Feb., and on 8 Feb. declared that ‘ministers ought to have resigned their places rather than have instituted the proceedings against the queen’.
He had no hesitation in declaring himself to be a reformer, but one of the most moderate description; and therefore he could only approve of such a plan of reform as was moderate and temperate in its principle ... On the whole, he would prefer that that House should be connected with the peers and the crown, and be in some measure under the direction of secret influence, than that it should be controlled by the harsh and overbearing power of popular clamour.
He also voted for Russell’s reform proposals, 9 May 1821. Soon afterwards he went to Paris, whence he travelled with Samuel Jones Loyd, Member for Hythe, to Switzerland and Italy.
At the Surrey county meeting, 4 Feb. 1822, Maberly ascribed agricultural distress to low prices, the return to the gold standard and, above all, the ‘enormous pressure of taxation’; echoing his father, he asserted that immediate abandonment of the ruinous sinking fund would facilitate reductions of £7,000,000.
Maberly voted for inquiry into the parliamentary franchise, 20 Feb. 1823. He had attended the Surrey county meeting to petition for relief from distress and reform, 10 Feb.; and when Denison, the county Member, presented its petition, 26 Feb., he signified his dissent from the proposition that the adjustment of the currency had created serious problems. He voted against inquiry into the currency, 12 June. He spoke and voted for his father’s motion for tax remissions of £7,000,000, 28 Feb., replying to objections to the scheme, which he reckoned would create a genuine sinking fund ‘perfectly secure from the rapacity of ministers’. He divided for parliamentary reform, 24 Apr., and reform of the Scottish representative system, 2 June. On Macdonald’s motion concerning the negotiations with Spain, 29 Apr., when he also presented a Daventry petition for repeal of the leather tax,
On 10 Feb. 1826 Maberly, speaking on the government’s plans to deal with the financial and commercial crisis, dismissed Baring’s bimetallic crotchet, paid tribute to the Bank of England’s recent conduct and argued that the basic causes of the difficulties were ‘overtrading’ and the ‘mania for speculation’. Although he had hoped to be able to support ministers on all commercial subjects, given their adoption of enlightened principles, he felt obliged to oppose their proposed restriction of the circulation of small notes, as he duly did on 13 Feb. Agar Ellis considered it
one of the most luminous and ingenious speeches I ever heard in Parliament, of course on the most purely politico-economical principles, and therefore according to my view too theoretical in some things; but his explanation of the causes of the late panic and present distress was admirable.
John Evelyn Denison* also thought that Maberly ‘spoke well’, even though he ‘did not hit the mark’ in his analysis.
Maberly obtained a lieutenant-colonelcy at the end of the year. On 14 and 21 Feb. 1827 he presented petitions from electors of Northampton complaining of the corporation’s application of corporate funds to electoral purposes; and on the latter date, when he detailed and denounced this ‘palpable abuse’, in what the backbencher Hudson Gurney thought a ‘very good’ speech, he moved that they be referred to a select committee. Before the close of the debate he altered the terms of his motion to make it one for general inquiry into the corporation’s payment of or engagement to pay election expenses.
Maberly did not seek re-election for Northampton at the 1830 general election, and failed to find a seat elsewhere.
As a minister, he voted steadily for the reintroduced reform bill, though he was in the minority for the disfranchisement of Saltash in the confused division of 26 July 1831. When speaking in favour of the passage of the bill, 20 Sept., he answered objections raised to its provisions for the mechanics of polling, defended it as a necessary and final corrective to the defects which time had wrought on the constitution and argued that far from being ‘democratic and revolutionary’, it was ‘quite aristocratic in principle’, and would be found to be so in practice from ‘being framed with a view rather to property than to numbers’. On departmental business, he joined in tributes to the ‘ability and economy’ of the previous board of ordnance, 27 June. He had something to say on the Irish miscellaneous estimates, 18 July. He voted with his colleagues on the Dublin election controversy, 23 Aug., and for Lord Ebrington’s confidence motion, 10 Oct. 1831. He was appointed to the renewed select committee on the East India Company, 27 Jan. 1832. He was a steady, though silent supporter of the revised reform bill in the 1832 session, when he also divided with his fellow ministers on the Russian-Dutch loan, 26 Jan., 12, 16, 20 July, relations with Portugal, 9 Feb., the navy civil departments bill, 6 Apr., the motion for an address asking the king to appoint only ministers who would carry undiluted reform, 10 May, and the Irish, 25 May, and Scottish reform bills, 1 June. On the navy estimates, 13 Feb., he defended the state of the buildings in the Cork depot. He explained the government’s attempt to present the ordnance estimates ‘in a constitutional and efficient manner’, 22 Feb.; corrected Hume’s misapprehension about the role of the Royal Military College, 28 Mar.; advocated a reduction in the enormous dead weight burden of military pensions, 2 Apr., and apportioned all the credit for reductions in the Irish ordnance establishment to the Grey ministry, 2 July. He was appointed to the committee of secrecy on the Bank, 22 May 1832.
In November 1832 Maberly, who was showing an interest in church reform ‘for the sake of the church itself’, was made clerk of the ordnance. At the general election the following month he was returned with government backing for Chatham after a contest with a disgruntled Liberal. He was also nominated for Abingdon by the supporters of his now financially ruined father in a vain attempt to prevent the seat falling into Conservative hands.
Though he was always pleasant to me after a fashion, his chief characteristic was ... indifference. He liked his station at the post office, he liked the salary which it gave him, he was fond of money, and he went through the work; but he was an Irish landlord ... married to a beautiful and brilliant lady, who wrote fashionable novels and went into society, so he had much besides the post office to occupy his thoughts ... [He was] a clear-headed man of business, inclined to let matters run in their ordinary groove, detesting all projects of reform, and having an abiding horror of Rowland Hill ... He was with me generally easily good-natured, but he could assume an air of hauteur and be uncommonly unpleasant sometimes.
A. Trollope, Autobiog. (1883), i. 59; E. Yates, Mems. of a Man of the World, 63-65.
Maberly’s lively and indiscreet wife, who published half a dozen novels, was sometimes an embarrassment to him, never more so than in 1846-7, when the ‘ridiculous and unbecoming’, though apparently platonic liaison into which her charms had betrayed Duncannon (then 4th earl of Bessborough and old enough to know better) caused tongues to wag and threatened to interfere with his ability to perform his duties as Irish viceroy in the new Russell ministry. His premature death in May 1847 possibly prevented a scandal over Mrs. Maberly’s suspected meddling in government business and patronage.
She died in 1875. Maberly himself, who enjoyed pensions from both the post office and the audit office, died at his London home at 23 Gloucester Place, Portman Square in February 1885. By his will, dated 31 Mar. 1876, he left all his property to his brother Evan Maberly. By a second codicil (15 Apr. 1879), he left annuities of £50 to two married women in Paris and the daughter of one of them, and to Emma Rosanna Harding (usually known as Bingham) of 353 Edgware Road.
