1. Allen Brown, R. (1989) Castles from the Air, Cambridge University Press, Cambridge.
2. Aston, M. A. (1993) Monasteries, Batsford, London.
3. Beresford, M. W. and St Joseph, J. K. S. (1979) Medieval England: An Aerial Survey 2nd edition, Cambridge University Press, Cambridge.
4. Brown, A. E. (1998) ‘The medieval landscape’ in The Story of Wadenhoe, ed. R. Duffey, Wadenhoe History Group, 42–50.