Penguin Books Ltd, Harmondsworth, Middlesex U.S.A.: Penguin Books Inc, 3300 Clipper Mill Road, Baltimore 11, Md [Educational Representative: D. C. Heath & Co., 285 Columbus Avenue, Boston 16, Mass]
Australia: Penguin Books Pty Ltd, 200 Normanby Road, Melbourne, S.C.5, Victoria
Agent in Canada: Riverside Books Ltd, 47 Green Street, Saint Lambert, Montreal, P.Q. __ Made and printed in Great Britain by William Clowes and Sons Ltd, London and Beccles __ First published 1943 Second edition 1945 Third edition 1951 Fourth edition, revised and enlarged, 1953