Subsequently, he served as chamberlain and referendary of antipope John XXIII and presided over the Paris Court of Accounts.

[4] On 16 August 1418 he was named lieutenant du roi and adviser to the Dauphin, in the provinces of Languedoc, Lyonnais and Mâconnais.

On 10 October, on safe conduct, he left for Saint-Denis to negotiate with the English represented by the bishop of Thérouanne, Lewis of Luxembourg, counselor of Henry VI of England.

[6] On 6 July 1435 he was in Arras to negotiate a treaty with the Duke of Burgundy, Philip the Good, then in Calais to reduce the tensions between France and England.

[4] On 4 April 1436[3] he was named administrator of the bishopric of Agde,[6] and officiated at the wedding of the Dauphin Louis to Margaret of Scotland, on 24 June in Tours.