Walter was elected to the
see of Durham on 21 April 1249, and was consecrated on 5 December 1249. King
Henry III of England had tried to secure the election of the king's half-brother,
Aymer de Valence, but did not succeed. Walter was consecrated at
York by
Walter de Gray, the
Archbishop of York. He also issued instructions on how the sacramental wine and bread were to be treated, and forbade the sale of them. Some doubt has recently been cast on the authorship of the statutes that were assigned to his time; they may have been the work of Farnham instead. Walter attempted to reduce the amount that was going to support his retired predecessor, Farnham, but even though he secured the support of the prior of Durham, they were unsuccessful. He did confirm Farnham's gifts to the monks of Durham, and increased them with gifts of his own. His conflict with
John Balliol over a manor both claimed, after an ambush where the bishop's servants were kidnapped, led to Walter imposing a penance on Balliol to support poor scholars at
Oxford. This was one of the first steps towards the founding of
Balliol College. In 1257 Walter was part of an embassy to Scotland during King
Alexander III of Scotland's minority. Walter's house in London was used by
Simon de Montfort during 1258. Walter may have supported Simon in Simon's dispute with King Henry III, for in 1258, Walter refused to come to court and quarrelled with the king. The cause of the quarrel may have been Walter's support of Simon. ==Death==