INTRODUCTION TO THE REVISED AND ENLARGED 
EDITION 
Hast thou a charm to stay the morning star 
In his steep course? So long he seems to pause 
On thy bald awful head, O sovran Blanc! 
The Arve and Arveiron at thy base 
Rave ceaselessly; but thou, . 
Risest from forth thy silent sea of pines, 
How silently! . 
. sing ye meadow streams with gladsome voice! 
Ye pine groves, with your soft and soul-like sounds! 
SAMUEL TAYLOR COLERIDGE. 
When in the lapse of a number of years an accumulation 
of knowledge and experience has enlarged or modified one’s 
mental vision, it is well if the advance goes on record. 
Now, although my estimate of the character and signifi- 
cance of bird music has undergone little material change 
during a period of seventeen years, it has grown proportion- 
ately with those years, and I have added in this new edi- 
tion the results of my latest study. It is not necessary to 
apologize for the insistence upon the value of musical nota- 
tion expressed in my Introduction to Bird Music, there is no 
avoiding the facts stated therein, nor any cause to enlarge 
on them; but there is something to be added in relation 
to the musical scales of the birds, and in appreciation of 
the musical record and its popular as well as scientific 
usefulness. 
When one attains the commanding summit of a high 
mountain the horizon is greatly enlarged. If one remains 
in the valley and mountain walls shut one in on every side, 
the world indeed seems small. Coleridge soared upward 
lke the lark when he wrote the lines quoted above. With 
Ww 
