124 PRIMEVAL MAN. 



themselves to new scenes and new necessities. 

 In like manner, of the evidence from Geology- 

 it may be said that we do not know how 

 rapidly changes of climate may have been 

 effected if the agencies which determine the 

 distribution of Sea and Land were more 

 active than they have been in historic times. 

 All these are pleas in mitigation of extreme 

 demands in point of time, and they are pleas 

 which may be fairly urged. But when all 

 due allowance has been made for the consid- 

 erations to which they point, there remains a 

 weight and concurrence of authority in favour 

 of a long chronology which grows and in- 

 creases In the minds of all who have studied 

 each one of the separate branches of inquiry. 

 For my own part I see no reason to be 



