1893-94-] 



65 



river, for instance) we should find its ends escarped, and not as 

 they now are, tapering to a point on each side. Why were 

 these elaborate defences which we find on the other side not 

 carried all round ? 



HIGH GROUND 



sec t r o n 



RATH 

 lOO r- 



LE LEVEL OF 



CIENT LAKE 



Ground plan of rath near Dromore, and section 

 of same restored. 



In order that you may better understand the weight of this 

 question, I must make a geological digression into the ante- 

 cedents of such river holms, for the benefit of such of you as 

 have not the familiarity with the habits of rivers that is to be 

 picked up in thirty year's practise of trout fishing. The 



