His parents were William de Vesci and Burga de Stuteville, daughter of Robert III de Stuteville. He paid his relief on coming of age in 1190. He was with King Richard I of England in Palestine in 1191. On 13 August 1199 he appeared as one of the guarantors of the treaty between the new king John of England and Renaud I, Count of Dammartin, and in the same year, probably later, he was sent to William the Lion of Scotland to promise him satisfaction of his rights in England, and witnessed his homage on 22 November 1200. He witnessed charters frequently in the early years of John's reign, in 1209 was one of the guardians of the bishopric of Durham, and on 10 April of the same year he was sent to meet William The Lion on his visit to England. He was serving the king in Ireland from June to August 1210. Accused of conspiring against John in 1212, he fled to Scotland. A tale of John's attempted seduction of his wife, and the trick played on him, first appears in Walter of Hemingburgh and bears a close resemblance to a classical model. His lands were seized, but after John's submission to the pope he was forced to invite Vescy back, though orders were sent on the same day to Philip of Oldcoates to cripple him by destroying his castle of Alnwick. On 18 July 1213 he was one of the recipients of John's pledge to abide by the decision of the pope concerning the things about which he had been excommunicated. On 5 November 1214 Pope Innocent III warned him not to trouble the king.
The Barons' Revolt
He was a leader in the First Barons' War, in 1215 marching south against King John I with Robert Fitzwalter. He was prominent among the barons who wrung Magna Carta from John, and was one of the twenty-five appointed to see it carried out. He was excommunicated by name with others of the barons in 1216. He supported in the confused situation ensuing Louis, the French dauphin, who was claiming the English throne. He was killed at a siege of Barnard Castle; while he accompanied Alexander II of Scotland on his way to do homage to Louis of France, on the way they laid siege to Barnard Castle, belonging to Hugh de Balliol, and, approaching too near, Vescy was shot through the head by an arrow. His lands were confiscated and given to Simon de Champ Rémy, Philip de Ulecot, and William de Harcourt.
