348 APPENDIX. 



4 



and more cultivated people might be driven to the hills. 

 Both kinds of deposits belong to one great period* and this 

 the oldest human age known to us ; and there are some reasons 

 to believe that portions of the cave deposits date as far back 

 as Lyell's Second Continental period, while some of the gravel 

 beds must have been deposited in the following times of 

 subsidence. Thus the difference in the contents of these 

 deposits must often be merely local rather than due to lapse of 

 time, and their contemporaneity or order of succession must 

 be worked out for each separate region independently. 



Butler & Tanner, The Selwood Printing Works, Frome. and London. 



