44 Professor J. W. Gregory — The English " Eskers " . 



higher ground. The frequent occurrence of the kames near Carvill 

 Lewis' terminal moraine line is significant, and the absence of them 

 and of osar from S. Yorkshire and from most of the Midlands and 

 East Anglia supports other evidence that nearly all that country was 

 free from land-ice. If England had been covered by glaciers as 

 far S. as the Thames valley, it is strange that neither kames nor 

 osar have been found in the E. Midlands or anywhere S. of Mid- 

 Yorkshire, with the exception of occasional kames along the 

 W. and S. margins of the North Sea ice. The rarity of osar is 

 also significant, since if they were the casts of glacial rivers they 

 would be expected on the high ground as well as on the lowlands. 



