^ DESCENT FROM A SINGLE PAIR. I07 



liatli made of one blood all nations of men 

 for to dwell on all the face of the earth." It 

 is of course conceivable that this full com- 

 munity of nature may have been given by the 

 Creator to two or more original pairs. But all 

 the evidence of science tends to the conclusion 

 that each well-marked species has spread from 

 some one centre of creation, and presumably 

 from a single pair. There is no clashing 

 between this evidence and the testimony 

 of Revelation as that testimony has hitherto 

 been interpreted. Strongly marked as the 

 varieties of Man now are, the variation is 

 strongest in respect to colour, which in all 

 organisms is notoriously the most liable to 

 modification and to change. And in this 

 feature of colour it is remarkable that wc 



