that, no matter how painstakingly arranged, no 

 words in our language can quite make clear. 

 Briefly, fortune at last was on my side — or was it 

 by perseverance I had won? . . . Within the two 

 preceding weeks I had cleared up the five major 

 points concerning the unanswered questions of the 

 past two years. In addition I had come upon an- 

 other matter of equal import; and it is this which 

 occasions my periodic pilgrimages to the dark- 

 room. 



By keeping these animals in darkness, I tried to 

 simulate as nearly as possible the conditions which 

 prevailed in their natural habitat. A further reason 

 for this seclusion was that it enabled observations 

 to be made at any time, even during the hours of 

 daylight. I had found, too, that though they re- 

 mained inactive when continuously exposed to the 

 glare of day, they seemed not seriously to mind the 

 shorter exposures to my artificial light. I say "seri- 

 ously" in the sense that they did not alter mark- 

 edly in their behavior: always there was a definite 

 reaction to sudden illumination, which was soon 

 followed by their resuming their interrupted activ- 

 ities. Witness now what happens as I flash the 

 lamp on this early-hour visit. 



[68] 



