 The Scots again besieged Roxburgh in 1460; in the course of the action metal fragments from the explosion of one of his bombards killed King James II of Scotland.However the Scots stormed Roxburgh, capturing it, and James' queen, Mary of Guelders, had the castle demolished.In 1545, during the war of the Rough Wooing, the English garrison commanded by Ralph Bulmer built a rectangular fort on the site at the instigation of the Earl of Hertford.