Penguin Books Ltd, Harmondsworth, Middlesex, England
Penguin Books Inc., 7110 Ambassador Road, Baltimore, Maryland 21207, U.S.A.
Penguin Books Australia Ltd, Ringwood, Victoria, Australia
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First published by John Murray 1859
Published in Penguin Books 1968
Introduction and bibliography copyright © J. W. Burrow, 1968
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Made and printed in Great Britain by
C. Nicholls & Company Ltd
Set in Linotype Juliana
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