Penguin Books Ltd, Harmondsworth, Middlesex
Penguin Books Inc., 3300 Clipper Mill Road, Baltimore, Md, 21211 U.S.A.
Penguin Books Australia Ltd, Ringwood, Victoria, Australia
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First published in the U.S.A. 1957
Published in Great Britain by Routledge & Kegan Paul 1957
This revised edition published in Pelican Books 1962
Reprinted 1964, 1965, 1966, 1967
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Copyright © Routledge & Kegan Paul, 1957
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Made and printed in Great Britain
by C. Nicholls & Company Ltd
Set in Monotype Baskerville
This book is sold subject to the condition that it shall not, by way of trade or otherwise, be lent, re-sold, hired out, or otherwise circulated without the publisher’s consent in any form of binding or cover other than that in which it is published and without a similar condition including this condition being imposed on the subsequent purchaser