A WELSH ROADSIDE. 153 



sent place, and that, too, at a date long sub- 

 sequent to the undoubted arrival of man upon 

 the earth. It was many ages after the low- 

 browed black-fellows hunted the rhinoceros 

 and the mammoth in the swamps of Gray's 

 Inn and the jungles of Fleet Street, that the 

 ice-sheet bore these boulders down the sides 

 of Llawllech to this big moraine. Some of 

 the smaller pebbles may even once have been 

 shapely stone hatchets of palaeolithic man, 

 long since ground down into indistinguishable 

 roundness by the enormous friction of the 

 moving glacier. In most cases, one can go 

 so far as to decide actually where the boulders 

 come from by the nature of the rock from 

 which they are derived ; this bit must have 

 been broken off the side of Aran, that bit 

 must have been detached from the summit of 

 Rhinog, and this other again must have 

 travelled all the way from the slopes of the 

 Berwyns. But, if any of them ever bore any 

 trace of human workmanship, all semblance 

 of manufactured articles has long been worn 



