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, 762 Whitehorse Road, Mitcham, 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 The Whitefriars Press Ltd, Tonbridge
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First published 1951