Note 967 — Chapter VI · ENGLAND AND THE BARONS. 1139–1147.
Reading edition
Under William of Chamai, “civitatis Oxenefordiæ præses, regalisque militiæ dux et assignator.” Gesta Steph. (Sewell), p. 112. This seems to mean that he was the king’s constable—an office which had apparently gone with the command of Oxford castle ever since the Norman conquest.