barons were furious and met in London, where Gaveston was excommunicated by the Archbishop of Canterbury and plans were put in place to capture Gaveston and prevent him from fleeing to Scotland. Edward, Isabella, and Gaveston left for Newcastle, pursued by Lancaster and his followers. Abandoning many of their belongings, the royal party fled by ship and landed at Scarborough, where Gaveston stayed while Edward and Isabella returned to York. After a short siege, Gaveston surrendered to the earls of Pembroke and Surrey, on the promise that he would not be harmed. He had with him a huge collection of gold, silver, and gems, probably part of the royal treasury, which he was later accused of having stolen from Edward. On the way back from the north, Pembroke stopped in the village of Deddington in the Midlands, putting Gaveston under guard there while he went to visit his wife. The Earl of Warwick took this opportunity to seize Gaveston, taking him to Warwick Castle, where the Earl of Lancaster and the rest of his faction assembled on 18 June. At a brief trial, Gaveston was declared guilty of being a traitor under the terms of the Ordinances; he was executed on Blacklow Hill the following day, under the authority of Lancaster. Gaveston's body was not buried until 1315, when his funeral was held in King's Langley Priory. Tensions with Lancaster and France Reactions to the death of Gaveston varied considerably. Edward was furious and deeply upset over what he saw as the murder of Gaveston; he made provisions for Gaveston's family, and intended to take revenge on the barons involved. The earls of Pembroke and Surrey were embarrassed and angry about Warwick's actions, and shifted their support to Edward in the aftermath. To Lancaster and his core of supporters, the execution had been both legal and necessary to preserve the stability of the kingdom. Civil war again appeared likely, but in December, the Earl of Pembroke negotiated a potential peace treaty between the two sides, which would pardon the opposition barons for the killing of Gaveston, in exchange for their support for a fresh campaign in Scotland. Lancaster and Warwick, however, did not give the treaty their immediate approval, and further negotiations continued through most of 1313. Meanwhile, the Earl of Pembroke had been negotiating with France to resolve the long-standing disagreements over the administration of Gascony, and as part