138 Charles Darwin. 



ceptive mind was well equipped to retain the enor- 

 mous fund of information he acquired, is shown by 

 the elaborate works he has handed down to pos- 

 terity. We have seen him as a youth reading his 

 paper on the Flustra to the Solons of the Plinian 

 Society ; a few years later, when still a young man, 

 we find him a leading and central figure among all 

 the naturalists of Europe, a leader of science in all 

 the term implies. 



In 1837 Henslow caused to be published some 

 extracts from his private letters which he considered 

 of public scientific value, and during the same year 

 several important papers appeared in the " Proceed- 

 ings of the Royal Zoological Society of London." 

 In 1838 papers and monographs followed each other 

 rapidly : " The Formation of Mould," " Observa- 

 tions on the Recent Elevation of the Coast of Chili," 

 "A Sketch of the Extinct Mammalia of the Pampas," 

 " Elevation and Subsidence in the Pacific," and 

 " Volcanic Phenomena," produced in this year, all 

 attracted attention in the scientific world. Up to 

 the time of his death Darwin published twenty-three 

 works, each of which is a record of indefatigable re- 

 search, and an exhaustive treatise on the subject in 

 hand. Besides these he produced eighty-one or 

 eighty-two papers, which were read and published 

 by the various scientific societies of Europe. 



The " log-book," which we have followed in the 

 trip around the world, was carefully written during 

 the voyage, and afterwards revised and published in 

 1839 ^s a part of Captain Fitz-Roy's report. In 

 1845 it was published separately, proving an imme- 



