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.
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Made and printed in Great Britain
by Unwin Brothers Ltd
Woking and London
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First published 1953