I owe more gratitude than I can say to the patience of my wife in putting up with the domestic commotion caused by the creation of this book. I am also deeply indebted to Mrs Carole Beesley, without whose cheerful and efficient help it could hardly have been finished, and to my daughter Elizabeth, whose assistance was crucial. To Jane Heller, finally, of Sidgwick and Jackson, more thanks are owed than any of us in the team could adequately express.
Having said all that I have to add that, although a good many hands have shared in the preparation of this book, the responsibility for anything that may be found wrong with it rests with me.
J. W. Hackett