Colyear’s father and grandfather had both served in the Scots Brigade in the United Provinces, and he naturally followed in their footsteps into the Dutch service, serving as a lieutenant in his father’s regiment upon its foundation in 1675. He later became lieutenant-colonel for another Scots regiment in the United Provinces, seeing action on the continent throughout the Dutch wars against Louis XIV. The loss of his right eye, which was visible in contemporary portraits, occurred however as a result of a duel in 1687. He sailed for England with the prince of Orange and on the last day of 1688 was given command of one of the regiments that James II had previously raised in the early part of that year with officers from the regiments of the Scots Brigade. This regiment took a prominent part in the Irish campaigns, and after the conclusion of the siege of Limerick in 1691 Portmore in April 1703 was appointed as military governor of the city. Colyear’s regimental record during the remainder of the Nine Years’ War is not entirely clear, but it included active service, and in May 1696 he was promoted major-general. Later that year he married James II’s former mistress, Catherine Sedley, suo jure countess of Dorchester. Far from respectable, and sometimes perilously indiscreet, Lady Dorchester had come under suspicion of disloyalty in the early years of William’s reign, but enjoyed a substantial pension and property in Ireland by virtue of her relationship with the late king. Gilbert Burnet, bishop of Salisbury, for one, viewed Colyear’s choice of wife cynically. While allowing that Colyear ‘is one of the best foot officers in the world, is very brave and bold, hath a great deal of wit, [is] very much a man of honour and nice that way’, he noted that ‘yet [he] married the countess of Dorchester, and had by her a good estate’.
Following the death of William III, Portmore was re-commissioned as major-general, and after the outbreak of war in 1702 his regiment was involved in heavy fighting in Flanders, with considerable losses, and, more successfully, in the attack on Vigo Bay.
Three years later there was again evidence of friction between Portmore and Seafield in the aftermath of the first election of Scottish representative peers. Portmore was not present at the election at Edinburgh on 17 June 1708, but completed a proxy vote at Westminster which he sent to Patrick Hume, earl of Marchmont [S], to present on his behalf.
It is unadvisable to read too much into this temporary alliance between Portmore and the Squadrone (and through the Squadrone to the Whig Junto). The consistent element in his political position from 1702 onwards was his alienation from Marlborough, and by 1710 this had developed so far as to encompass Godolphin as well, who had previously spoken well of Portmore. In the summer of that year, when a replacement for Galway as commander of the army in Portugal had to be found, Godolphin, who now dismissed Portmore as ‘a fop’, tried to block his promotion by suggesting Richard Savage, 4th Earl Rivers, for the post instead. Rivers, though, refused, leaving the way open for the queen to propose Portmore.
Portmore completed a proxy vote for the ensuing election of Scottish representative peers, entrusting it to Archibald Primrose, earl of Rosebery [S].
Portmore’s wife continued to solicit further favours on his behalf. Hearing that George Hamilton, earl of Orkney [S], was to be made a general of foot, she wrote to Harley on 30 Apr. 1711, asking him to
take the first opportunity to represent to her majesty that this would be giving away my lord’s rank, who is an older lieutenant general than Lord Orkney. A thing of that nature is seldom done to the meanest officer, much less to one of my lord’s post actually in the queen’s service.
Harley was obviously keen to help, for he marked this letter as having been answered ‘immediately’.
Portmore’s connection with Oxford (as Harley became in May 1711) also opened the way for his entry into the House of Lords. In July 1713 Oxford’s son-in-law, George Hay, styled Lord Dupplin (later Baron Hay [S]), included Portmore’s name in a list headed ‘peers pretending next elections’.
He first sat on 16 Feb. 1714, the first day of the new Parliament, and he went on to attend 72 per cent of the sitting days of this first session of Feb.-July 1714. His proxy with John Erskine, 22nd earl of Mar [S], was registered on 17 Apr. 1714, only for Portmore to resume attendance, thus vacating the proxy, three days later. Although he was absent on only three occasions between the first meeting of Parliament and the end of April 1714, Portmore was during this time more concerned with negotiating the purchase of the regiment of John Dalrymple, 2nd earl of Stair [S]. The agent and middleman involved in these transactions assured Oxford that he should ‘applaud the earl of Portmore’s forwardness to part with such a sum in this juncture to show his zeal to her majesty’.
Once the purchase had been concluded Portmore continued to attend diligently and missed only five sittings in May. In early June Daniel Finch, 2nd earl of Nottingham, forecast that Portmore would support the schism bill brought up from the Commons on 2 June 1714. The Journal’s attendance register suggests that he attended throughout proceedings on this bill. In a committee of the whole on 9 June two amendments were proposed to the bill, one in favour of exempting schoolmistresses from the scope of the bill and the other of allowing appeals to the justices of the peace. Reporting on these debates, George Baillie‡ told his wife that Portmore was in favour of both of these amendments, against the wishes of Oxford and the ministry. Baillie further suggested that yet again there was a difference between Portmore and the 4th earl of Findlater [S] (as Seafield had become), as the latter ‘left’ Portmore and two other Scots peers by voting against the second amendment, after having voted with them on the first.
As early as May 1711 Oxford had been made aware that Portmore had Jacobite connections, when it was reported that he had secured the rehabilitation of the exiled Jacobite laird of Strowan.
Lord Portmore has at several times declared his resolution … that, if any attempt be made in England, he will cheerfully come into it and bring a considerable sum into the field with him, and he maintained his having 30,000 l. ready for that purpose … Lord Portmore’s opinion was that 10,000 men in England would effectually do the work.Ibid. ii. 69.
Despite these assurances Portmore continued to avoid a decisive commitment, a reluctance which Mar attributed to the influence of Lady Dorchester, who ‘was consulted in all such matters by him’.
Portmore died at his house in Weybridge on 2 Jan. 1730, and was buried in St James’s church beside his wife, whose remains had been removed there the previous September from Bath, where she had died in 1717.
