Copyright © 1949 by Brian Curtis 



All rights reserved under Pan American and 

 International Copyright Conventions. 



Published in the United Kingdom by Constable 

 and Company Limited, 10 Orange Street, London 

 W. C. 2. 



This new Dover edition, first published in 1961, 

 is an unabridged and unaltered republication of 

 the second revised edition, first published by 

 Harcourt, Brace and Company in 1949. 



Manufactured in the United States of America 



Dover Publications, Inc. 



180 Varick Street 



New York 14, N.Y. 



