Penguin Books Ltd, Harmondsworth, Middlesex, England
Penguin Books Pty Ltd, Ringwood, Victoria, Australia
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First published by Longmans 1957
Newly revised edition published in Pelican Books 1966
Copyright © David Thomson, 1957, 1966
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Made and printed in Great Britain by
Hazell Watson & Viney Ltd
Aylesbury, Bucks
Set in Linotype Times
This book is sold subject to the condition that it shall not, by way of trade, be lent, re-sold, hired out, or otherwise disposed of without the publisher’s consent in any form of binding or cover other than that in which it is published