Eden was destined by his father for a public career. The reversion to a tellership of the Exchequer was procured for him at the age of eight in token of his father’s public services. In September 1801 he was offered the situation of private secretary to Lord Buckinghamshire, which his father accepted for him, not at once, but in the following year. During this apprenticeship in public business he obtained the sinecure office of vendue master at Demerara, worth ‘at least’ £1,000 p.a. ‘Almost his whole existence,’ wrote his father, 28 Dec. 1803, ‘is passed between his drill, his desk, and the first and best classes of society—with unwearied activity and discretion; and at the same time with all the gaiety of his age.’ This routine ended in May 1804, when his father was snubbed by Pitt (and the King) on the change of administration and declined to involve Eden in any compensatory expectancy. He had shown, Auckland informed the King, ‘excellent talents and singular steadiness’. In July 1805 Auckland’s friend the 4th Duke of Marlborough thought that he would be able to provide Eden with a seat in Parliament at the dissolution. Auckland applied to the Duke of Northumberland for the same purpose, 14 Oct. 1805, but without success.
When Auckland was restored to office in 1806, he asked Lord Grenville for employment for his son, who had ‘the most promising character’ and ‘the fairest hopes’ of a seat.
At the election of 1806 the Duke of Marlborough nominated him for Woodstock, where he was faced with a contest but succeeded with ease. He thereupon resigned his colonial sinecure in favour of his brother George. His official appointment was a diplomatic one and tenable with a seat in Parliament. He assisted the Whigs in the Westminster election after his own return.
Eden, whose patron allowed him freedom of action, rallied to opposition in the divisions of 26 June and 6 July 1807. On 30 June he moved for shipping returns to answer critics of the American Intercourse Act passed under his father’s aegis and ‘to show the shipowners that they had nothing to expect from their pretended friends’. Viscount Howick urged him to follow the subject up. Tierney was glad to find him ‘quite keen in his politics’ and henceforward he began ‘to take a pretty active and businesslike part in the House’.
On 19 Jan. 1810, in London for the parliamentary session, Eden disappeared from home: his father could not believe that he had any suicidal intention, being ‘most regular and most cheerful’ and enjoying ‘every advantage that this world can give’; but when his body was found floating in the river on 25 Feb., there was no sign of foul play. The inquest was therefore non-committal. John William Ward commented: ‘Poor Eden ... I am afraid he threw himself into the river’. Eden’s papers revealed only his preoccupation with public business. The Speaker noted in his diary ‘He left his keys on his table. He had taken leave of a lady with whom he had lived occasionally.’
