First published 1956

This edition reprinted 1974 by

Methuen & Co Ltd

11 New Fetter Lane

London EC4P4EE

and Barnes & Noble Books (New York)

10 East 53rd Street

New York NY 10022

(a division of Harper & Row Publishers Inc.)

Printed in Great Britain by

Whitstable Litho, Straker Brothers Ltd

Methuen SBN 416 79030 X

Barnes & Noble SBN 06 4714837