282 OBITUARY X 



other matters. In 1844, he published his observa- 

 tions on the volcanic islands visited during the 

 voyage of the " Beagle." In 1845, a largely re- 

 modelled edition of his " Journal " made its appear- 

 ance, and immediately won, as it has ever since 

 held, the favour of both the scientific and the un- 

 scientific public. In 1848, the " Geological Ob- 

 servations in South America " came out, and this 

 book was no sooner finished than Darwin set to 

 work upon the Cirripedes. He was led to under- 

 take this long and heavy task, partly by his desire 

 to make out the relations of a very anomalous 

 form which he had discovered on the coast of 

 Chili ; and partly by a sense of " presumption in 

 accumulating facts and speculating on the subject 

 of variation without having worked out my due 

 share of species." (II. p. 31.) The eight or nine 

 years of labour, which resulted in a monograph of 

 first-rate importance in systematic zoology (to say 

 nothing of such novel points as the discovery of 

 complemental males), left Darwin no room to re- 

 proach himself on this score, and few will share 

 his " doubt whether the work was worth the con- 

 sumption of so much time." (I. p. 82.) 



In science no man can safely speculate about 

 the nature and relation of things with which he is 

 unacquainted at first hand, and the acquirement 

 of an intimate and practical knowledge of the 

 process of species-making and of all the uncertain- 

 ties which underlie the boundaries between species 



