124 RECENT FLINT FINDS, 



The ground and polished Celts of the Second Stone Period of 

 Lyell, are so obviously the work of man, and are so often found 

 with other indications of his presence, that there can be no doubt 

 they belong to the domain of the Antiquary. But the flint- 

 flakes, so far as they are now included in the First, or Prse- 

 Adamite, Stone Period, are within the province of the geologist, 

 being formed and deposited by natural causes ; and thus the 

 boundary line between antiquarian records and geological facts 

 must, in my opinion, be drawn between the First and Second 

 Stone Periods of Lyell. 



