Sir John Summerson (1904-1992) was the curator of Sir John Soane's Museum in London for almost forty years, simultaneously teaching the history of architecture at the Architectural Association in London and at Birkbeck College, University of London. His many books include Architecture in Britain 1530-1830 for the Pelican History of Art series and The Classical Language of Architecture. SIR HOWARD COLVIN is Emeritus Fellow of St. John's College, Oxford University. His previous books include Essays in English Architectural History, A Biographical Dictionary of British Architects 1600-1840, Unbui...