secure Tower of London, Edward attempted to garner support from within the capital. The city of London rose against his government, and on 2 October he left London, taking the Despensers with him. London descended into anarchy, as mobs attacked Edward's remaining officials and associates, killing his former treasurer Walter Stapledon in St Paul's Cathedral, and taking the Tower and releasing the prisoners inside. Edward continued west up the Thames Valley, reaching Gloucester between 9 and 12 October; he hoped to reach Wales and from there mobilise an army against the invaders. Mortimer and Isabella were not far behind. Proclamations condemned the Despensers' recent regime. Day by day they gathered new supporters. Edward and the younger Despenser crossed over the border and set sail from Chepstow, probably aiming first for Lundy and then for Ireland, where the king hoped to receive refuge and raise a fresh army. Bad weather drove them back, though, and they landed at Cardiff. Edward retreated to Caerphilly Castle and attempted to rally his remaining forces. Edward's authority collapsed in England where, in his absence, Isabella's faction took over the administration with the support of the Church. Her forces surrounded Bristol, where Hugh Despenser the Elder had taken shelter; he surrendered and was promptly executed. Edward and Hugh the Younger fled their castle around 2 November, leaving behind jewellery, considerable supplies, and at least £13,000 in cash, possibly once again hoping to reach Ireland, but on 16 November they were betrayed and captured by a search party north of Caerphilly. Edward was escorted first to Monmouth Castle, and from there back into England, where he was held at the Earl of Lancaster's fortress at Kenilworth. Edward's final remaining forces, by now besieged in Caerphilly Castle, surrendered after four months in March 1327. Abdication Isabella and Mortimer rapidly took revenge on the former regime. Hugh Despenser the Younger was put on trial, declared a traitor and sentenced to be disembowelled, castrated and quartered; he was duly executed on 24 November 1326. Edward's former chancellor, Robert Baldock, died in Fleet Prison; the Earl of Arundel was beheaded. Edward's position, however, was problematic; he was still married to Isabella and, in principle, he remained the king, but most of the new administration had much to lose were he to be released and potentially regain power. There was no established procedure for removing an English king. Adam Orleton, the bishop