This volume in the series deals with the repair and conservation of historic stone masonry. Seven papers discuss projects of research and development such as evolving systems of protection, keyhole or microsurgery techniques, an 18-year experimental project using the consolidant Brethane, the use of lime treatments, sacrificial graffiti barriers and soft wall capping. Two focus on case studies: the Church of Holy Cross Temple, Bristol, and Wellington Arch at Hyde Park Corner in London.