In 1241, Walter already held a number of livings in various parts of the country; in 1256 he was an agent for
Walter of Kirkham,
bishop of Durham, in a lawsuit. Walter was also
prothonotary of the chancery in 1258. Walter rose to prominence as a skilled lawyer and negotiator. When
Henry III went to France to negotiate the 1259
Treaty of Paris, Walter was left behind as a trusted royal servant. On 29 March, the Justiciar ordered 100 barons to muster in London for a secret meeting that would take them overseas. Only a few days later Walter could be seen at
Malden, Surrey, assisting in the registration of the Justiciar's army. The writs were pre-dated, then considered a new procedure at some risk to the messengers' delivery of the writs to Sheriffs in the locality. Walter also helped in the complex financial dealing with King
Louis IX of France, when he reached London on 30 April. In return for a promise of peace, Henry received 12,500 Livres, the equivalent of 500 Knight's Fees. By 1264, this would be a total of 134,000 Livres of subsidy from the King of France. Walter played an invaluable part in the administration of Henry's revenues. By 1259, Walter had suitably impressed the king that he was granted a
prebendary of
St. Paul's, London.
Lord Chancellor On 12 July 1261
Henry III made him
chancellor, in place of
Nicholas of Ely. A month earlier, the Papal Bulls in support of Henry's coup d'état had ensured it was safe for the king to return to the Tower of London. With a mercenary at his back, he had marched from Dover over Whitsun. In London, Walter was reinstalled as chancellor in a 'resumption of royal power', having been briefly challenged by the baronial movement. Walter provided legal arguments for the collection of
tallage, rejection of the baronial constitution, the appointment of royal Sheriffs, and a renewed attempt to justify the collection of Customs. Now only a cussed
Philip Basset, among the barons, remained aloof from the fray, when the King's new ministrations emerged against the
Provisions of Oxford. As one of the arbitrators, Walter met the barons with Walerand and Basset. He was probably not the king's first choice among the nobility, but the sticking point remained the method by which to appoint sheriffs, from 'faithful men and people' in the shires. Later that month of May 1261, De Merton had helped define
Jus regalitatis, a law that prohibited criticism of the King; a flagrant breach of the commitment at Oxford. A year later, Henry would describe the sheriffs as
bachelarii regis qui tenent comitatus or his bachelors. For the regents were men of the second rank, not nobles, yet they owed their elevated status entirely to royal service. In 1262, Walter acquired lucrative
sinecures such as the new prebendary of
Exeter, and became a
canon of
Wells. The following year, when
de Montfort was at the height of his powers, Walter was urged by the bishop of Worcester to accept a form of peace
satis competens et honesta. It is possible that Walter was a member of
Richard of Cornwall's deputation sent from Windsor to greet Montfort's army coming east from London and Kent. But on 16 July, when the king surrendered peace terms, and three days later de Montfort assumed power, Walter also left office.
Merton College In 1261, two manors in Surrey were set aside for the support of "scholars residing at the schools" at
Merton Priory; it was the beginning of
Merton College. In 1264, Walter drew up statutes for a "house of the scholars of Merton", at
Malden in Surrey; ten years later these scholars were transferred to
Oxford, and a permanent house was established. Merton College, thus founded and endowed, was one of the earliest examples of collegiate life at Oxford. De Merton's statutes provided for a common corporate life under the rule of a warden but, as vows were to be taken and scholars entering a monastic order forfeited their scholarship, the college was really a place of training for the secular clergy. Freed from the responsibilities of government, Walter turned his attention to his college again. The statutes were redrafted and scholars moved permanently to Oxford. They were established on the site of the parish church of St John whose
advowson he had obtained in the early 1260s and where he had been buying adjoining houses and halls since 1264. In 1270 he bought
Kibworth Harcourt, Leicestershire as part of the confiscated estate of Saer de Harcourt, an erstwhile supporter of
Simon de Montfort. While De Merton was labouring for the establishment of Merton College, the barons emerged triumphant. Walter, a partisan friend of Henry III, was removed from the chancellorship in 1263. He was not immediately restored after the king's victory, but he did renew his acquaintance with the royal circle, by now at Windsor.
Edward I and Chancellor Merton Walter is mentioned as a
Justiciar in 1271. He was re-appointed as Lord Chancellor, four days after Henry III's death on 16 November 1272.
Bishop of Rochester Edward I had left England in 1268 to participate in the
Ninth Crusade and, in the new king's absence, Merton stood in his place, effective Regent of England. Edward commanded the respect of his household and wardrobe, anticipating a welcome return. This is signified in a letter of 9 August sent from Melun, France in which Walter was promised the King's full support. However, on Edward's return to England, Walter was dismissed as Lord Chancellor on 21 September 1274, in favour of
Robert Burnell, who became a strong ally of the Edwardian regime. ==Death and legacy==