xii AUDUBON THE NATURALIST 
H. Wetherill, of Philadelphia. For the use of new photo- 
graphic and other illustrative material, I am further indebted 
to Mr. Stanley Clisby Arthur, of the Conservation Commis- 
sion of Louisiana, and to Cassinia, the medium of publication 
of the Delaware Valley Ornithological Club. 
Through the kindness of Messrs. Charles Scribner’s Sons 
I have been permitted to draw rather freely from Audubon 
and His Journals, by Miss Maria R. Audubon and Elliott 
Coues, and to reproduce three portraits therefrom; original 
photographs of two of these have been kindly supplied by Dr. 
R. W. Shufeldt. I also owe to the courtesy of the Girard 
Trust Company, of Philadelphia, the privilege of quoting cer- 
tain letters contained in William Healey Dall’s Spencer Ful- 
lerton Baird. 
To my esteemed colleague, Professor Benjamin P. Bour- 
land, I am under particular obligations for his invatuable aid 
in revising translations from the French and in the translitera- 
tion of manuscripts, as well as for his kindly assistance in 
correspondence on related subjects. I have derived much 
benefit also from my sister, Miss Elizabeth A. Herrick, who 
has made many valuable suggestions. To all others who have 
aided me by will or deed in the course of this work I wish to 
express my cordial thanks. 
Francis H, Herrick. 
Western Reserve University, 
Cleveland, 
July 2, 1917. 
