I wish to acknowledge warmly the contribution made by my sister-in-law, Hilary Foister Benford, to this book. She contributed significantly to the manuscript, bringing to it her special qualities of interest in people. Certain characters are in part her creation. As a native of England and a graduate of Cambridge University, she gave invaluable help in developing and maintaining a consistent British idiom. Without her contribution this would be a quite different book.
GREGORY BENFORD
Cambridge
August, 1979