Correspondence. 571 



excavated by Jones than that it sliould have been hollowed out by a 

 stream." 



Now, Sir, if Mr, Green had put ''cart wheels," in place of the 

 name for which I have substituted " Jones," I think it would have 

 been still less incredible, etc. But the above is an intentional mis- 

 representation of my argument altogether. " Jones" does not happen 

 to be an agent of denudation in the geological sense, at least ; but 

 on this my reasoning hangs. 



What I stated was this, — that of two acknowledged agents of 

 denudation, the sea on the one hand, and streams, etc., on the other, 

 we have positive proof that the former overspread the region of 

 Todmorden valley, and we have no evidence of the latter, therefore 

 " it is less incredible," etc. 



To conclude. Sir, I think it would conduce more to the advance of 

 science if discussions of this kind were confined to the region of 

 physics ; attempts at proving, or disproving, the soundness of specu- 

 lations on natural phenomena by a logical syllogism are, as it 

 appears to me, scarcely creditable to men of science. 

 I remain, yours faithfully, 



Edward Hull, 

 Manchester, 



16fh November, 1866. 



PRE-HISTORIC DWELLINGS IN GALWAY BAY. 

 To the Editor of the Geological Magazine. 



Dear Sir, — I have just learned from the Eev. W. Kilbride, vicar 

 of the Aran Isles, at the mouth of Galway Bay, that he and my 

 old college chum, Capt. Eowan, of Tralee, have discovered on the large 

 island, under the Sand-dunes south of Tramore (anglice, the large 

 strand), and extending from them seaward below high- water mark, 

 ancient habitations, consisting of Cloghauns, Fosleac, Kitchen-mid- 

 dens, etc., etc. This ought to prove that the land about Galway 

 Bay has sunk last, not risen. If this is the case, "The Old Lake" 

 mentioned in the paper " On the Eock Basin of Lough Corrib," in 

 the Geological Magazine for November, may have been partly 

 formed since the Glacial period. The bogs now below high- water 

 mark may also have been formed on high land ; but still the fact 

 remains, that the morass between Black-rock and Black's-hill, in 

 which peat is forming and trees growing, is below high-water mark. 



G. Henry Kinahan. 



Eecess, Connemara, 



Nov. 10, 1866. 



THE DENUDATION OF THE WEALD. 

 To the Editor of the Geological Magazine. 



Sir, — In the last number of the Geological Magazine, (p. 484), 

 the Eev. 0. Fisher mentions our paper on the Medway Gravels and the 

 Denudation of the Weald ; ^ and after saying that we " rely much 

 upon a river gravel at an elevation of 300 feet," he adds, " I do not 



1 Quart. Jouru. Geol. Soc, 1865, Vol. xxi., p. 443. 



