VI PREFACE 



I am also under deep obligation for many privileges extended to me 

 and for their unfailing courtesy in the many demands I made on their 

 time and patience, to Mr. Charles W. Mead, of the American Museum 

 of Natural History, and to the authorities of many of the libraries of 

 Washuigton and elsewhere, especially of the Library of Congress, of 

 the libraries of the Bureau of American Ethnology, the National 

 Museum, the Surgeon General's Office, the Geological Survey, and 

 the Paii-American Union, of the Day Missions Librar^^ of Yale, and 

 of the New York Public Library, 



John M. Cooper. 



Washington, D. C, September 11. 191G. 



