His other noted publication was a book on the Battle of Lewes (1264) between King Henry III and Simon de Montfort, but he is most noted for his interest in nature conservancy.
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In 1263 he was made constable of Windsor, and after the battle of Lewes he appears to have been placed on the supreme council of nine, and to have been one of its three members (acting also as custodes sigilli) who were in attendance on the king and Simon de Montfort throughout the campaign of Evesham.