J. Kenneth Major is an architect with a life-long interest in windmills, watermills and animal-powered machines. A former Chairman of the Wind and Watermill Section of the Society for the Protection of Ancient Buildings. As the representative for the western Home Counties on the Council for British Archaeology Industrial Monuments Committee he has been involved in the rescue and restoration of three horse engines, and this led him into the study of that neglected form of prime mover, the animal-powered machine. He had studied these machines in Britain and Europe and, with Hugo Brunner, wrote ‘Water Raising by Animal Power’, which was the first comprehensive study of one branch of the subject. This Shire title was written to draw together the whole range of knowledge concerning this area of industrial archaeology.