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This edition first published in Penguin Books 1968
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This edition copyright © Penguin Books, 1968
Introduction and notes copyright © H. J. Oliver, 1968
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Made and printed in Great Britain by Western Printing Services Ltd, Bristol Set in Monotype Ehrhardt
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