provided feedback, encouragement and stimulus; John Worthen and Cornelia Rumpf-Worthen provided meals and a desk for the final phase. Finally this work would not have been possible without the support of Stefan Kirmse, who accompanied its production over many years.I would like to thank all my family, but in particular, my uncle, Gordon Tourlamain, and his late wife Pauline, for both their moral and financial support, which made it possible to embark on this project in the first place.I dedicate this book to my parents, John and Moyra Tourlamain.