iy Mr. John Farcy^f. oi \f^S(%Jl i~ -.51 



h\ these parts : the Coal Measures, consisting of a cont'u'.ual 

 alternation of hard and soft strata 250 or 300 yards thick, 

 are there seen dipping W., 1 yard in 1-| yard; through all 

 of which strata a vale is excavated ; while the surface of the 

 country is denudated almost to a level, and exhibits but the 

 faintest tablets (page 262) of the hard rocks ; whose edges 

 must once have stuck up, in frightful confusion, and whose 

 several beds are now so strikingly visible in Godley Brook 

 course, and in the shafts of (he coal-mines adjommg. 



" Before further committing himself," in " this departure 

 from Nature, by an assumption of extinct or imaginary" 

 lakes, it will be well for Mr. Carr to view the vale I have 

 mentioned, and as many others as he pleases, to the east 

 and south-east of it, and to endeavour to trace and particu- 

 larize the places, where lakes have existed therein, so that 

 I can refer to the spots on my Map. in which case, I doubt 

 not of being able at any time lo reply to him, from the mi- 

 nutes and specimens which I have preserved, relative to the 

 strata, hills and valleys of that part of my survey : and I 

 pledge myself so to do : especially if he complies with my 

 former request (page 445) of informing us, Where the exca- 

 vated matters of the whole or of any material parts of the 

 vales in question have been deposited ? as the •' alluvial 

 flats" ihereof, "which have formed ^he bottoms of the 

 lakes, and which have been brought down from the detritus 

 of the valley above," (page 455) ought to furnish him with 

 the ready means of doing, unless, indeed, he has been " in-- 

 dulging himself in the creation of hypothetical phantoms." 



The supposition, " that the several ranges of valleys have 

 been purposely and specially formed for the streams which 

 now flow though them," is so far from being " too absurd 

 to merit a moment's attention," that 1 feel proud to repeat, 

 that it has «;ngaged much of my attention, and shall con- 

 tinue so to do, as Icng as I continue to find excavated slopes 

 of valleys, originating on the summits of very high hills, 

 both at the heads and on the sides of such valleys, and where 

 none of the " tpring-heads," on which Mr. C. lays so much 

 Stress, are to be found, and even where none ever did or can 

 run, on account of the open nature of the hard rocks, in 



D « which 



