Dry stone walls of Britain range from the stone hedges of south-west England to the mountain walls of North Wales, running for miles over severe country, and often climbing slopes of over 45 degrees. They happen also to be in the areas that attract many tourists, and so it is not surprising that the walls that are an integral part of the landscape should provoke so many questions: 'When were they built?', 'Who built them?', 'How do they stand up without cement?' This book answers these and many other questions. The reasons for building dry stone walls, th story of their development, technical details of the construction, regional styles, and the state of the craft today are all covered.