VI prisoner, and defeated and killed Warwick in the Battle of Barnet on 14 April. With his cousin dead, Thomas landed at Sandwich, sending his ships to sail around Kent and up the Thames Estuary. He himself advanced over land towards London, gathering troops as he went, and received notable support from Canterbury and its mayor Nicholas Faunt. Edward meanwhile headed west to oppose the Lancastrian army advancing from the West Country. On 4 May he triumphed in the Battle of Tewkesbury, killing Edward, Prince of Wales, Edmund Beaufort, Duke of Somerset, and John Beaufort, the duke's younger brother, and capturing the Queen, Margaret of Anjou. Unaware of these events, Thomas reached Southwark, and on 14 May wrote to the city government of London, asking to be allowed to bring his men into the city. They refused, and he responded by burning Southwark. When London still refused him entrance he prepared a three-pronged assault on the city. He removed the artillery from the ships and placed it on the south bank of the Thames so that he could bombard the city. Most of the Bastard's army was sent upstream to cross the river and come back to attack London at Aldgate and Bishopsgate. A third party would try to cross London Bridge. His assault ultimately failed. His bombardment failed to weaken the will of the London defenders, and the assault at London Bridge was beaten back by the fire of artillery placed by the Londoners at their end of the bridge. The attack on Bishopsgate was disrupted by the Earl of Essex, who arrived as it was under way. The party that had the most success was the one at Aldgate, which managed to force the gate open but was beaten back by the defenders' counterattack. Pursued, the Bastard and his army retreated as far as Stratford and Blackwall, where they boarded the ships and crossed back into Kent. He then made his way westward to Kingston upon Thames to oppose Edward IV. Edward Woodville, Lord Scales, who held London for Edward, recognized the king's danger, for the Bastard's army was estimated at twenty thousand men, and recruits were stated to be still coming in. Woodville sent word to the Bastard that Edward IV was quitting England, and thus induced him to return to Blackheath. From there Thomas journeyed with six hundred horsemen via Rochester to Sandwich, where he learned