He was son of George Douglas, governor of Laurence, Lord Oliphant; the father was said to be an illegitimate son of Sir George Douglas of Lochleven, brother of Sir
William Douglas, 6th Earl of Morton. Sir George helped Mary Queen of Scots to escape from Lochleven in 1567, and at the end of the seventeenth century the Scottish historians stated that Queen Mary was the mother of Sir George's illegitimate son.
Gilbert Burnet states, in the manuscript copy of his 'History of his own Time' in the British Museum, that the rumour that Robert Douglas was Queen Mary's grandson was very common in his day, and that Douglas 'was not ill-pleased to have this story pass.' Wodrow (Analecta, iv. 226) repeats the tale on the authority of 'Old Mr. Patrick Simson,' and suggests that it was familiar to most Scotchmen. But the report may be a Whig fiction fabricated about Queen Mary to discredit the Jacobites of the seventeenth and eighteenth centuries. He was educated at the
University of St Andrews, where he took the degree of M.A. in 1614. at the
Battle of Breitenfeld (1631) He became minister of
Kirkaldy in 1628, and a year later was offered a charge at
South Leith, which he declined. He became chaplain to one of the brigades of Scottish auxiliaries sent with the connivance of Charles I to the aid of
Gustavus Adolphus in the
Thirty Years' War. Gustavus landed in Germany in June 1630;
Robert Wodrow, in his 'Analecta,' gives several anecdotes, showing how he appreciated Douglas's advice. Returning to Scotland, he was elected in 1638 member of the General Assembly, and in the following year was chosen for the second charge of the High Church in Edinburgh. In 1641 he was removed to the Tolbooth Church, and in July of the same year preached a sermon before the Scottish parliament. In the following year he was chosen moderator of the general assembly—a post he also held in 1645, 1647, 1649, and 1651—and in 1643 he was named one of the commissioners of the
Westminster Assembly. In 1644 he was chaplain to one of the Scottish regiments in England, an account of which he gives in his 'Diary'. In 1649 he was retransferred to the High Church in Edinburgh (
St Giles), and with other commissioners presented the
Solemn League and Covenant to the parliament, and was appointed a commissioner for visiting the universities of Edinburgh, Aberdeen, and St Andrews. In the following year he was one of the ministers who waited on Charles II at
Dunfermline to obtain his signature to a declaration of religion; but as this document reflected on his father, Charles refused to sign it. The result was a division in the Scotch church on the matter, Douglas being a leader of the resolutioners, the party which preferred to treat the king leniently. The Church of Scotland was now unhappily split into two contending sections. Old friends who had fought side by side in earlier days became opponents, and there was much bitterness and occasionally misrepresentations, due in some cases to misunderstandings, exaggerated reports or false rumours. Of the Resolutioners, Robert Douglas was, by head and shoulders, the acknowledged leader. His ministerial supporters included
David Dickson,
Robert Baillie, and James Wood. Among the Protesters the most outstanding ministers were
James Guthrie,
Samuel Rutherfurd,
Andrew Cant,
Patrick Gillespie, and John Livingstone; and, of the elders,
Wariston and Sir John Cheisly; the two most strenuous fighters being Guthrie and Wariston. In January 1651 Douglas officiated at the coronation of Charles II at Scone, preaching a sermon in which he said that it was the king's duty to maintain the established religion of Scotland, and to bring the other religions of the kingdom into conformity with it. Douglas was sent prisoner to London by
Oliver Cromwell, when he suppressed the Scotch royalists, but was released in 1653. In 1654 he was called to London with other eminent ministers to consult with the Protector on the affairs of the
Church of Scotland. Douglas was now the acknowledged leader of the moderate presbyterians or 'public resolutioners,' and retained the position till the
Stuart Restoration, which he largely helped to bring about. In 1659 he joined with the other resolutioners in sending
James Sharp to London to attend to the interests of the Scottish church, and Wodrow (
Sufferings of the Church of Scotland) gives most of the correspondence which took place between them. In this year Douglas preached the sermon at the opening of
Heriot's Hospital. After the Restoration Douglas was offered the bishopric of Edinburgh if he would agree to the introduction of episcopacy into Scotland, but declined the office, and remonstrated with Sharp for accepting the archbishopric of St. Andrews. He preached before the Scottish Parliament in Edinburgh in 1661, and 27 June 1662 was removed to the pastorate of
Greyfriars Kirk. For declining to recognise episcopacy Douglas was deprived of this charge on 1 October 1662. In 1669 the privy council licensed him as an indulged minister to the parish of
Pencaitland in
East Lothian. He died in 1674, aged 80. ==Family==