For twenty-five years John McCann photographed modern architecture for architects and the architectural journals. Since 1975 he has studied the traditional buildings of the English country and their historic origins. As a mature student he read for an honours degree in history at King's College, London University. He has lectured and written extensively about vernacular architecture and has tutored numerous courses for Cambridge University and the Workers' Educatonal Association.

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• The four processes: cob, shuttered earth, clay lumpe and pise; The history of earthen walling; The regional pattern; Survivals and revival; Further reading; Other sources of information; Index