4 
FOREWORD 
the brute ends and the human begins ? Many 
of the emotions of man’s heart find their counter- 
part in the life of birds. That we do not perceive 
this proves only how dull is our sight. 
“To him who in the love of Nature holds 
Communion with her visible forms, she speaks 
A various language.” 
We hear and interpret according to the keenness 
of our own ears. 
Irene Grosvenor Wheelock. 
Chicago, January, 1902. 
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