FIRST PUBLISHED IN I949 

 SECOND IMPRESSION I95O 



This book is copyright under the 



Bertie Convention. No portion of 



it may be reproduced by any process 



without written permission. 



Inquiries should he addressed to the 

 publisher 



PRINTED IN GREAT BRITAIN 



in 12 point Bembo type 



BY UNWIN BROTHERS LTD 

 WOKING AND LONDON 



