Murray was the half-brother of three Jacobites ‘out’ in the ‘15, two of whom also held high command in the rebel army in the’45. Brought up as a Whig, he owed his advancement to Islay’s friendship for his half-brother James, who, displacing William, the Jacobite heir, succeeded as 2nd Duke in 1724. Murray supported Walpole until his fall and thereafter attached himself to Pelham and Newcastle.
Re-elected in 1754 after some abortive opposition, Murray was listed ‘pro’ by Dupplin, remained faithful to Newcastle, and voted for him in the division of 2 May 1757 on Minorca. During the 1757 negotiations, when Newcastle was considering an administration which might exclude Argyll, he listed Murray as attached neither to himself nor the ‘Viceroy’ but among the Scots ‘not to be relied on at present, to be treated with’. Murray’s relations had deteriorated both with Atholl and Argyll, whose interference in regimental affairs he resented.
Against Atholl he had a private grievance. Believing that, since Lord George was attainted, the succession to the dukedom should devolve upon himself, he resented Atholl’s marrying his daughter to young John Murray, Lord George’s son, and suspected his reconciliation with Lady George and her Jacobite friends. During the militia agitation young Murray on 1 Apr. 1760, presided at a freeholders’ meeting, of which Lord John later complained to Hardwicke:
Mr. Murray was attended by most of [the Tories and non-jurors] in order to petition Parliament for a militia ... which was his first public appearance in the county. I made an objection to one part of it, viz. that Jacobitism was totally eradicated out of this county, when so many were present that never qualified; it was insisted it should remain in the petition, and was accordingly, as they were the majority.
Lord John perforce presented the petition without his modifications, and in the division of 15 Apr. voted for the militia bill.
When two months later Atholl set up his son-in-law as candidate for the county, Lord John, in dismay, appealed to Newcastle and Hardwicke for support: ‘I have kept the Whigs united above 26 years and the Tories have been kept under for want of a head until now.’
Although formally reconciled with Murray and Atholl,
At the general election of 1768 and again in 1769 Lord John made an attempt to replace Andrew Mitchell in Elgin Burghs, but was again disappointed. In 1773, when Graeme vacated Perthshire and three candidates contested the by-election, Lord John circularized the freeholders, recounting his past services:
This great contest is likely to breed so much animosity ... that ... I presume ... for the peace and quiet of our county ... to make an offer of myself to represent you for the short time this Parliament has to continue ... you’ll have time to consider more deliberately who will be the most proper to give your united voices to at the general election.
When ‘nobody offered to support him, he gave his vote to his nephew’ James Murray.
After this rebuff Lord John abandoned Perthshire, sold most of his Scottish estates, retired to Bannercross, and made no further attempt to enter Parliament. Disappointed of a command during the American war, he devoted himself to his Royal Highlanders, of whose interests he was a pugnacious defender.
