Blantyre’s father had been a strong supporter of the Revolution, raising a regiment for the prince of Orange and acting as a commissioner of supply for the shires of Lanark and Renfrew. In 1696 he endorsed the Association. By 1702, however, he had come to be associated with James Hamilton, 4th duke of Hamilton [S], in the ‘country’ opposition. He was among those who seceded from the Scottish Parliament after the accession of Queen Anne and was their representative sent to her to present their case against the continuation of the Convention Parliament.
In October 1702 the 5th Lord Blantyre’s cousin, the dowager duchess of Richmond, had died in possession of a vast fortune which contemporaries estimated at £60,000. She bequeathed to his son and heir Walter an annual pension of £4,000 p.a. for 20 years. She also purchased for his benefit Lethington Castle in East Lothian, which she insisted be renamed ‘Lennox’s Love to Blantyre’; this was quickly shortened merely to Lennoxlove, which soon became Walter Stuart’s residence. However, when the 5th Lord Blantyre died in late April 1704 he left his estate heavily burdened by debt, a state of affairs that Walter, the new Lord Blantyre, himself did very little to put right, apart from pestering the treasury in London for payment of the very considerable arrears of the duchess of Richmond’s pension.
The 6th Lord Blantyre’s politics were complicated by conflicting loyalties. On the one hand, his religious preferences were Episcopalian, which drew him close to the ‘cavalier’, Jacobite faction.
On 10 Nov. 1710, however, Blantyre was elected as a representative peer.
Blantyre took his seat on the opening day of the new Parliament, 25 Nov. 1710, and two days later he was appointed to the committee for the address on the queen’s speech. He was present for 76 per cent of the sitting days of this first session of the Parliament in 1710-11. In the first two weeks of January 1711 Blantrye, with other representative peers, supported the attack on the previous Whig ministry’s conduct of the war in Spain.
Blantyre’s proxy with William Livingston, 2nd Viscount Kilsyth [S], was registered on 6 Dec. 1711, one day before the session of 1711-12 commenced, and he was not expected to arrive in the English capital until 15 December.
After attending two of the many prorogations of Parliament in March 1713, Blantyre resumed his seat when the next session convened for business on 9 Apr. and attended 48 per cent of the sitting days of this, his last session. On 24 Apr. he and George Seaton petitioned the House for the reversal of judgments made by the lords of session, in their capacity as commissioners for planting churches, in favour of John Currie, the minister of Haddington. At the beginning of June Oxford (as Harley had become) thought him likely to support the bill to confirm the eighth and ninth articles of the French Commercial Treaty; the bill, though, never came up from the Commons. With all the Scots peers, including Argyll and Ilay, Blantyre backed the unsuccessful motion on 1 June for leave to introduce a bill to dissolve the Union.
He attended for the last time on 17 June 1713. Six days later, on 23 June, a petition was read from Blantyre stating that he was too ill to attend for the hearing of his appeal against John Currie scheduled for the following day and requesting a postponement. He was not exaggerating in this claim for that same day John Elphinstone, 4th Lord Balmerinoch [S], a fellow Episcopalian, reported that ‘this day about two o’clock poor Blantyre died of a fever. He was much a servant to two noble brothers but they nor any mortal could not influence him to favour presbytery nor the Union, both which he detested’.
