In researching and writing any book like this, the author is always grateful to those who have helped to ease his way. Acknowledgements for quotations are given at the end of each chapter and in the captions to the photographs. Nevertheless, I would also like to thank Ian Carter and his colleagues in the Imperial War Museum Photograph Archive and John Stopford-Pickering in the Imperial War Museum Sound Archive for their excellent help and efficiency, all of which is given with such good grace.