PREFACE
xiii
I am also very appreciative of the excellent work of our photographers, Arthur Riddle
and, in particular, Derek Standen, who have been responsible for most of the illustrations
in this book.
Last, but by no means least, my warmest thanks are due to the publishers of this
book, Blackwell Scientific Publications, for their understanding and great trouble they
have taken to comply with my wishes.
Ludwig Guttmann
