Murray’s father, an army officer and master of horse to Mary of Modena, lost his regiment at the Revolution and during the 1690s suffered several terms of imprisonment on strong suspicion of Jacobitism. However, he turned his coat in 1703, abandoning the ‘cavaliers’ for the Scottish court party, an act of apostasy which earned him condemnation by the Jacobite George Lockhart‡ as a ‘wretch of the greatest ingratitude’. Lockhart considered the first earl’s desertion ‘inexcusable, [he] having about £500 a year of his own, and yet sold his honour for a present which the queen had yearly given his lady since the Revolution’.
Murray succeeded his father as 2nd earl of Dunmore in April 1710, and immediately asked for the vacant governorship of Blackness castle. This time Marlborough supported his pretensions, describing him as ‘a very sober, discreet young man’ and noting the family’s poor financial circumstances: ‘he is certainly left very ill’. It was Godolphin who, regretfully, raised difficulties: there were others with stronger claims, notably James Livingston, 5th earl of Linlithgow [S].
In the autumn of 1711, presumably in response to an enquiry from Marlborough, Dunmore informed the duke coolly that ‘it is by the queen’s permission I have been absent from my company this summer, which I would not have been if the ill condition of my little private affairs had not obliged me to it. The queen has since prolonged my leave of absence’. This was a sign that all was not well between the two men, and helps explain a later comment by the duchess of Marlborough that ‘after I was out of my place it is tedious and monstrous to repeat what… Lord Dunmore did to me after having advanced him by the Duke of Marlborough’s interest’. He never visited her, and ‘would meet me without so much as making me a bow, but in a very rude way looked at me without taking any notice of me’.
On 8 Oct. 1713 Dunmore was unanimously elected as one of the representative peers.
Dunmore died in London on 18 Apr. 1752 and was buried in Stanwell, Middlesex, an estate he purchased in 1720. He never married, although Lady Mary Wortley Montagu alleged that he cohabited for many years with Mary, Lady Lansdown (d. 1735). He was succeeded in the peerage by his next brother, William Murray, an active Jacobite, as 3rd earl of Dunmore [S]. His younger brother Robert‡ was elected to the Commons in 1722 and sat until 1738 as a government supporter.
