Henry William Carless Davis, 1911 Encyclopædia Britannica, Volume 7… (1911)
“ The Great Council now recognized the archbishop as chief justiciar, and he remained at the head of the government till 1193, when he was replaced by Hubert Walter. The archbishop did good service in the negotiations for Richard’s release, but subsequently quarrelled with his master and laid Normandy under an interdict, because the border stronghold of Château Gaillard in the Vexin had been built on his land without his consent. After Richard’s death the archbishop accepted John as the lawful heir of Normandy and consecrated him as duke. ”
