Eustace was selected as treasurer in 1217, probably on 4 November, and held the office until his death.Fryde, et al. Handbook of British Chronology p. 103 He held the prebend of Holbourn in the diocese of LondonGreenway Fasti Ecclesiae Anglicanae 1066-1300: Volume 1, St. Paul's, London: Bishops before being elected to the see of London on 26 February 1221 and consecrated on 25 April 1221.Fryde, et al. Handbook of British Chronology p. 258
