TO 



HIS GRACE THE DUKE OF ARGYLL, 



K.T., P.O., D.C.L., F.E.S., &c. &c. &c. 



MY LORD DUKE, 



Your Grace's contributions to 



Physical Geology, and your able Presidential Addresses to 

 the Geological Society, London, have clearly manifested 

 that, whilst giving full weight to those arguments on Sub- 

 serial Denudation which have of late years been so domi- 

 nating with the modern school of Geologists, you have 

 not permitted them to exercise an undue influence over 

 your conclusions, but have been enabled to trace to other 

 and yet earlier geological agencies, also, the physical fea- 

 tures of our Earth's surface. 



It is therefore with no ordinary satisfaction that I avail 

 myself of your Grace's permission to dedicate to you this 

 brief attempt to maintain, by observations in the field, 

 those views so ably advocated by your Grace. 



I have the honour to be, 

 My LORD DUKE, 



Your Grace's most obliged, 



and most obedient Servant, 



G. HENKY KINAHAN. 



H.M. GEOLOGICAL SURVEY, 

 WEXFORD. 



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