The Spanish blanks plot was an alleged pro-Spanish Catholic conspiracy in Scotland, discovered in late 1592. A number of letters to Spain were discovered, which included blank sheets signed by prominent nobles.
, Minister of Paisley was sent to arrest George Kerr, son of Mark Kerr of Newbattle. George Kerr was about to sail to Spain from the west coast of Scotland, and carried incriminating correspondence. He was arrested at night on the Isle of Cumbrae. The "Spanish blanks" which were found with other letters in a chest on Kerr's boat, were documents signed by four members of the Catholic nobility of Scotland, and otherwise left to be filled in. At first, the English diplomat Robert Bowes supposed the blanks had writing in invisible ink written with "white vitriol". James VI and Anne of Denmark were at Alloa Tower celebrating the wedding of the Earl of Mar and Marie Stewart, festivities were cut short when Sir John Carmichael and Sir George Home arrived from Edinburgh with news of the crisis. James VI rode to Edinburgh, where the kirk ministerRobert Bruce and Robert Bowes explained their understanding of the situation and threat to him. George Kerr, his servant, and the letters were taken to Edinburgh and examined by the Privy Council on 2 January 1593. Under torture, Kerr said that the blanks were to be filled in by Crichton, to forward a Spanish invasion. Damagingly for James VI, Kerr was also carrying a copy of aposition paper by the king on the possible advantages to him in accepting Spanish help.
The fourth signature on the papers discovered was that of Sir Patrick Gordon of Auchindoun. Erroll and Huntly were given a date of 5 February to appear and explain themselves: they did not do so, and went to ground in the north. The king was confronted by them on 24 October, on the road from Soutra to Fala, south-east of Edinburgh; they explained that the blanks related to their support for the Jesuits in Scotland. Others involved were:
David Graham, Laird of Fintry. A Catholic, he was executed on 15 February 1593.
Hew Barclay of Ladyland
John Ogilvy
Aftermath
An official account of the plot appeared in February 1593; it is assumed it was edited by John Davidson. It by no means included all the intercepted letters; but it printed a number concerned with William Sempill in 1589; the connection was that when Sempill's servant Pringle was found in England carrying letters to the Duke of Parma, they had included some from Huntly and Erroll. Perceptions of James VI shifted after the discoveries: some assumed the affair showed the king had at least tacitly approved dealings with Spain, and many more put it down to slackness in anti-Catholic measures.