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2. Allen Brown, R. (1976). English castles (3rd ed.). London: Batsford.
3. Allen Brown, R. (1985). Dover castle. London: English Heritage.
4. Allen Brown, R. (1986). Rochester castle (2nd ed.). London: English Heritage.
5. Allen Brown, R. (2003). Royal castle building in England 1154–1216. In R. Liddiard (Ed.), op. cit. (pp. 133–177).