Adams, W. H. Davenport  1828-1891 <br/><br/>
Some Heroes of Travel ;  or, Chapters from the History of Geographical Discovery and Enterprise  [electronic resource] / 
W. H. Davenport Adams 
 -  Project Gutenberg,  2013 
 - Project Gutenberg  42749 .
<br/><br/> Public domain in the USA. 
<br/><br/>Electronic text