Acknowledgements

I am very grateful to Alex Wright for suggesting that I should write this book, and for being so helpful during the process. I also owe much to Paul Tompsett, Ronnie Hanna, David Campbell and all the production team. I owe thanks to Durham University for providing me with continued access in my retirement to its library facilities, both in printed and electronic form. The process of research has been transformed in recent years by the availability of sources in electronic form, and it would not have been possible to write this book without the Internet Archive, the Hathi Trust and Gallica. As ever, I owe a huge debt of gratitude to my wife for her help and advice.