Lamb was almost certainly the illegitimate son of George IV, who, as prince of Wales, conducted an affair with Lady Melbourne in 1783, and was his godfather. Though in his youth he appeared short, clumsy and coarse by comparison with his brothers William (visct. Melbourne from 1828) and Frederick, he was also high-spirited, intelligent and possessed some talent for writing and acting. Although he was said to possess ‘one of those natures which affects the artist, but cannot, for want of natural force, go beyond the amateur’, Lamb succeeded ‘to some extent in obtaining a literary and political celebrity’ by having a comic opera staged at Covent Garden in 1807. He was an active member of the management committee of Drury Lane theatre at a critical period of its history, and published his translation of the poems of Catullus in 1821. He thus acquired a reputation as ‘a good-natured, agreeable, and rather insouciant man – a virtuoso and affected connoisseur in art, literature, and politics’.
On the death of Sir Samuel Romilly in 1819, Lamb had been elected for Westminster, a seat he failed to retain in 1820. From 1822, he was the nominee of his wife’s half-brother and benefactor, the 6th duke of Devonshire, for Dungarvan.
Although Lamb was successful in preventing the partial disenfranchisement of Dungarvan under the Irish Reform Act, and had enjoyed a friendship with Daniel O’Connell, local repealers wished to see him relieved of his parliamentary duties and given more leisure ‘for indulging in his dramatic taste and arranging theatrical criticisms’.
From 1830, Lamb’s contributions to parliamentary debate had been largely confined to the official business of his department, which, by 1833, ranged from curtailing the privileges of the Company of Apothecaries, to matters closer to heart, such as the protection of dramatists’ copyright and the regulation of theatrical performances in the metropolis. With regard to social affairs, Lamb was opposed to empowering magistrates to suppress cruel sports, such as dog fighting and bear baiting, seeing ‘no reason why the sports of the poor should be interfered with more than those of the rich’.
As ‘the official organ of the home department’ in the Commons, Lamb defended the government’s suppression of potentially violent meetings, such as the National Convention at Coldbath-Fields on 13 May 1833. Having served on the select committee into the affair, Lamb defended the police against accusations of heavy-handedness.
Lamb lived chiefly at Brocket Hall, where he built up the basis of its present library. In spite of a ‘robust constitution’, his immoderate intake of alcohol may have contributed to the sudden and unexpected deterioration of his health after suffering ‘an accident’ late in 1833. He died at his residence in Whitehall-yard on 2 January 1834 and was buried at Hatfield. He left his Richmond property and his freehold chambers in Lincoln’s Inn to his wife, and his inheritance of £20,000 to his brother Frederick. Lamb’s death was considered ‘a real loss’ to the government, and he was remembered as ‘a sensible, straightforward upright officer … a warm-hearted man, who was never more pleased than when he was rendering a service’.
