Penguin Books Ltd, Harmondsworth, Middlesex, England
Penguin Books Inc., 7110 Ambassador Road, Baltimore, Maryland 31207, U.S.A,
Penguin Books Australia Ltd, Ringwood, Victoria, Australia
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First published by the Cambridge University Press 1939
Revised edition published 1958
Published in Pelican Books 1971
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Copyright © Cambridge University Press, 1958
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Made and printed in Great Britain by
Cox & Wyman Ltd,
London, Reading and Fakenham
Set in Monotype Bembo
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 prior 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