James VI and I died at Theobalds Palace in Hertfordshire on 27 March 1625. In the weeks afterwards, the official line – from courtiers, preachers and poets alike – was that James had died well, confident in his salvation, firm in his Protestant faith, and surrounded by the men he treasured most: his son Charles, and his favourite, George Villiers, Duke of Buckingham. It was a comforting story, designed to enhance the monarchy’s prestige while easing the awkward transition from one reign to the next. But already in these early weeks, another, far less comforting, story of James I’s last days had begun to worm its way into contemporary imaginations. This secret history, the unauthorised version of James’s death, would take another 12 months to achieve a definitive form, but…