Hill was the youngest brother of the 3rd marquess of Downshire and Lord Arthur Moyses Hill, Member for Down. He entered the army in May 1817, serving initially in the duke of Wellington’s regiment, and transferred to the Royal Irish Dragoons in 1825. At the general election of 1826 he was proposed for Carrickfergus, where Downshire was a minor landowner, but withdrew after a token contest, stating that he had been unaware of the nomination, in favour of the sitting Member Sir Arthur Chichester.
Hill was listed by ministers among their ‘friends’, but was absent from the division on the civil list that led to their resignation, 15 Nov. 1830, and subsequently followed his brothers in adhering to Lord Grey’s coalition government. He declined to present the Carrickfergus petition for radical parliamentary reform, but voted for the second reading of the reform bill, 22 Mar., and against Gascoyne’s wrecking amendment, 19 Apr. 1831.
Hill, who made no known parliamentary speeches, issued an address from Paris, 11 Oct. 1832, in which he boasted of his assiduity in attending on the reform question and announced his retirement on account of ill health. He returned to Ireland in time to assist the return of his brother Lord Arthur Marcus Hill for Newry at the general election of 1832, but apparently never sought to re-enter Parliament himself.
