Allen Brown, Reginald, Allen Brown's English Castles, The Boydell Press, 1976 [1954], ISBN 1-84383-069-8
Allen Brown, Reginald; Curnow, P, Tower of London, Greater London: Department of the Environment Official Handbook, Her Majesty's Stationery Office, 1984, ISBN 0-11-671148-5
Friar, Stephen, The Sutton Companion to Castles, Sutton Publishing, 2003, ISBN 978-0-7509-3994-2
Impey, Edward; Parnell, Geoffrey, The Tower of London: The Official Illustrated History, Merrell Publishers in association with Historic Royal Palaces, 2000, ISBN 1-85894-106-7