In presenting this book, John Ashurst and I have many people to thank, particularly Ian Bristow for his admirable introduction to the subject of conservation on which successive contributors have built; and David Honeyborne, whose name has long been associated with pioneering work in the field of stone weathering. Many others are owed much, and it is a debt which cannot adequately be repaid. For my part I must thank John Ashurst, first and foremost for the constant aid and encouragement he has given. Without him the shoe leather would not have hit the pavement carrying the wearer to yet another building to add to the record.
