EXCURSIONS OF AN EVOLUTIONIST 



musk-sheep and the marmot in the valley of 

 the Thames heralded the slow approach of the 

 northern ice-sheet. But the fact that human 

 remains of a date even more remote than this 

 have also been found in Portugal and California 

 shows, as I have said already, that man was then 

 no newcomer upon the face of the earth, but 

 must certainly have been in existence for many 

 thousands of years, though as yet we are unable 

 to assign either his primeval habitat or the pre- 

 cise epoch of his first appearance. 



January, 188*. 



