10 



tracing chains of consequences from hypotheses was 

 so much less developed than the genius for acquaint- 

 ance with vast volumes of detail, and for seizing upon 

 analogies and relations of the more proximate and 

 concrete kind. While on the Thayer expedition, I 

 remember that I often put questions to him about 

 the facts of our new tropical habitat, but I doubt if 

 he ever answered one of these questions of mine 

 outright. He always said : " There, you see you 

 have a definite problem : go and look and find the 

 answer for yourself." His severity in this line was 

 a living rebuke to all abstractionists and would-be 

 biological philosophers. More than once have I heard 

 him quote with deep feeling the lines from Faust: 



'' Grau, tlieurer Freiuid, ist alle Theorie, 

 Unci grim cles Lebens goldner Baiim." 



The only man he really loved and had use for was 

 the man who could bring him facts. To see facts, 

 not to argue or raisonnircu, was what life meant for 

 him ; and I think he often positively loathed the 

 ratiocinating type of mind. '• Mr. Blank, you are 

 toialhj uneducated ! " I heard him once say to a 

 student who propounded to him some glittering 

 theoretic generality. And on a similar occasion 

 he gave an admonition that must have sunk deep 

 into the heart of him to whom it was addressed. 

 " Mr. X., some people perhaps now consider you a 

 bright young man ; but when you are fifty years old, 

 if they ever speak of you then, what they will say 

 will be this: ^ That X., — oh, yes, I know him; he 



