4 INTRODUCTION 
American Beaver and His Works” (published in 
1868 by J. B. Lippincott & Co.), Horace T. Mar- 
tin, F.Z.S., &c., for “ Castorologia, or the History 
and Traditions of the Canadian Beaver” (1892), 
Ernest Thompson Seton for “Life Histories of 
Northern Animals,” and Enos A. Mills for “In 
Beaver World” (1918), and to the Jesuit fathers. 
For the photographs which illustrate this volume 
I can but say that I have done my best, and have 
never spared myself in my efforts to get the most 
satisfactory results. Some of the photographs of 
the animals themselves have been slightly re- 
touched. It is my first offence in this direction, 
and has only been done because after careful con- 
sideration it seemed so very necessary. The reader 
will never realise the amount of Jabour that has 
been devoted to securing the pictures given, for 
they are illustrations rather than pictures. Let 
him therefore pass over their defects with a kindly 
consideration and not be too severe if in the text 
he finds statements which do not agree with his 
own ideas and experiences. 
A. RADCLYFFE DUGMORE. 
Crete Hit, 
SoutH NUTFIELD. 
