Robert the Bruce, the grandson of the claimant to the crown in 1291, had sided with the English in the winter of 1301–02. By 1304, most of the other nobles of the country had also pledged their allegiance to Edward, and this year the English also managed to re-take Stirling Castle. A great propaganda victory was achieved in 1305 when Wallace was betrayed by Sir John de Menteith and turned over to the English, who had him taken to London where he was publicly executed. With Scotland largely under English control, Edward installed Englishmen and collaborating Scots to govern the country. The situation changed again on 10 February 1306, when Robert the Bruce murdered his rival John Comyn, and a few weeks later, on 25 March, was crowned King of Scotland. Bruce now embarked on a campaign to restore Scottish independence, and this campaign took the English by surprise. Edward was suffering ill health by this time, and instead of leading an expedition himself, he gave different military commands to Aymer de Valence, 2nd Earl of Pembroke, and Henry Percy, 1st Baron Percy, while the main royal army was led by the Prince of Wales. The English initially met with success; on 19 June, Aymer de Valence routed Bruce at the Battle of Methven. Bruce was forced into hiding, and the English forces recaptured their lost territory and castles. Edward acted with unusual brutality against Bruce's family, allies, and supporters. His sister, Mary, was imprisoned in a cage at Roxburgh Castle for four years. Isabella MacDuff, Countess of Buchan, who had crowned Bruce, was held in a cage at Berwick Castle. His younger brother Neil was executed by being hanged, drawn, and quartered; he had been captured after he and his garrison held off Edward's forces who had been seeking his wife, daughter and sisters. Edward now regarded the struggle not as a war between two nations, but as the suppression of a rebellion of disloyal subjects. This brutality, though, rather than helping to subdue the Scots, had the opposite effect, and rallied growing support for Bruce. Death and burial In February 1307, Bruce resumed his efforts and started gathering men, and in May he defeated Valence at the Battle of Loudoun Hill. Edward, who had rallied somewhat, now moved north himself. He developed dysentery on the way, and his condition deteriorated. On 6 July he encamped at Burgh by