Penguin Books Ltd., Harmondsworth, Middlesex, England
Penguin Books Inc., 3300 Clipper Mill Road, Baltimore 11, Md, U.S.A.
Penguin Books Pty Ltd, Ringwood, Victoria, Australia
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First published by the Edinburgh University Press 1961
Published in Penguin Books 1964
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Copyright @Edinburgh University Press, 1961
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Made and printed in Great Britain by Lowe and Brydone (Printers) Ltd, London
Set in Monotype Imprint
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