Darwin, Charles,  1809-1882 <br/><br/>
Charles Darwin :  His Life in an Autobiographical Chapter, and in a Selected Series of His Published Letters  [electronic resource] / 
Charles Darwin 
 -  Project Gutenberg,  2012 
 - Project Gutenberg  38629 .
<br/><br/> Public domain in the USA. 
<br/><br/>Electronic text