Penguin Books Ltd, Harmondsworth, Middlesex
U.S.A.: Penguin Books Inc, 3300 Clipper Mill Road, Baltimore 11, Md
Canada: Penguin Books (Canada) Ltd, 178 Norseman Street Toronto 18, Ontario
Australia: Penguin Books Pty Ltd, 762 Whitehorse Road,
Mitcham, Victoria
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First published 1957
Made and printed in Great Britain by T. & A. Constable Ltd, Edinburgh Photogravure plates printed by Clarke & Sherwell Ltd, Northampton