1. Gibson, A. V. B. and Hewett, C. A. 1987Hertfordshire Archaeology, Figs. 185–89
2. Harvey, J. 1961English Cathedrals.London: Batsford
3. Hewett, C. A. 1982Church Carpentry.Chichester: Phillimore
4. Hewett, C. A. 1974English Cathedral Carpentry.Wayland
5. Hewett, C. A. 1985English Cathedral and Monastic carpentry.Chichester: Phillimore