‘Sir Peter’ Murray owed his return to Parliament to Lord Melville, who was his father’s cousin and his wife’s brother-in-law. When Murray was recommended to him as a replacement for George Abercromby, the sitting Member for Edinburgh, Melville, who knew Murray was ambitious to become a baron of the Exchequer as well as a Member of Parliament, alleged that ‘it is not a good thing for him’; but ‘no person more advisable’ materialized and Murray was returned unopposed. Opposition tried to unseat him on petition on the grounds of disqualification through his Exchequer office, but the attempt failed.
expressing, in my person, your steady attachment and most honourable adherence to the interests of a statesman who has long and most deservedly possessed your gratitude and confidence, and whose wishes you possibly conceive you may gratify, by the election of one who is connected with him by ties the strongest and most indissoluble.
Edinburgh Advertiser, 4-7 Nov. 1806.
In his maiden speech, 9 Apr. 1807, Murray vindicated the royal dismissal of the Grenville ministry and more particularly ‘in a very able and spirited manner’, as the King was informed, defended Melville against an attack of Romilly’s: Romilly, who admitted that his speech was a bad one, referred in his journal to ‘some very angry observations’ from Murray.
On 23 Sept. 1811 Murray informed Lord Melville that his hopes that the additional income from his place would enable him to bring his family to London with him had evaporated and that his private affairs were so much ‘embarrassed’ that he must curtail his attendance. He offered to resign his place at Melville’s convenience and meanwhile announced that, owing to his wife’s confinement, he would be absent until February. He informed the whip that he had paired with Lord John Campbell.
Murray, still hankering after an independent line, did not return to the fold at the ensuing general election, when he was content to play second fiddle to Graham in Perthshire. On Graham’s obtaining a peerage he renewed his pretensions to Perthshire, but his relations with his allies were uneasy, because he was unable to combine his hostility to the Atholl interest with political opposition to the government, and he withdrew before the election in 1818.
