1. The Origin and Development of Crown-Post Roofs
2. J. T. Smith, ‘The Reliability of Typological Dating of Medieval English Roofs’, 239–69 in R. Berger (ed.),Scientific Methods in Medieval Archaeology(California, 1970), 258–59.
3. E. Mercer,English Vernacular Houses(London, 1975), 82–95.
4. C. A. Hewett,Engish Cathedral Carpentry(London, 1974), 28–29.
5. In Dugdale'sMonasticon;see also R. J. E. Boggis,A History of St Augustine's Monastery, Canterbury(Canterbury, 1901), opp. 9.