Wr. Farey’s Notes on Mr. Bakewell’s Geology. 359 
*P. 93s. from within a Mile or two of Ludlow, to Landeg- 
ley (mentioned by Mr. B. page 297), thence to 
near Brecon, where I have traced it for some 
Miles, 1 think, and thence to the shore of the 
Bristol Channel at Llanstephen and Llaughern, 
where Mr. Smith has, I believe, observed it. 
100, 1. 3 and 4, Markfield knowl *.—* See p. 291, and 
Markfield Witdmill Hill, in Rep. i. 45 and 144. 
106, ]. 1, balls fall out *.—* As at Long-lane and Knot- 
Low, Rep. i. 278, &ce. At Pentre-Berw, 2m. SSE 
of Llangefni in Anglesea, I lately observed the 
same thing, in a decomposing whin-dyke. 
1. 3 and 4, similar structure t.—tT Sienite on Mount 
Sorrel Hill, P. M. xxxv. p. 260. , 
108, 1. 8 and 9, the same line of longitude *.—* Some 
Jatitude of expression, is certainly taken, in saying 
that these places are nearly on one meridian, espe- 
cially if Bath is near their range, as supposed in 
page 305, in order to account for ihe heat of its 
Springs, by the aid of this vast train of lava! ! 
Mr. B’s general inference as to the northern and 
southern direction of Basalt, is not borne out by 
British facts, since the most considerable Basaltic 
range known therein, stretches nearer to east and 
west than to any other of the eight principal points 
of the compass, viz. from near Montrose on the 
German Ocean, to Dumbarton on the Clyde, in 
Scotland, and forwards, I believe, to Antrim in 
Ireland, as mentioned in my first Letter, p. 54. 
}..19, north and south t.—t This general remark, I 
believe also to be unfounded, at any rate the Dyke 
mentioned at p. !25, the longest and most re- 
markable in England, has been traced near 60 
Miles, almost in an east and west direction; I 
have seen it at Silhow-Cross in the Road to 
Whitby, and believe that it proceeds forwards to 
the Sca Coast; at its western end, it intersects, 
and is lost in, the great basaltic mass, near the 
head of the Tees, as I learned from Mr. John 
Bird, an artist at Whitby, and a very attentive 
observer of Geological phenomena. 
In the Isle of Anglesea, I have had an oppore 
tunity, since the above was written, of tracing 
two very considerable Whin-dykes, and of seeing 
two smaller ones (in the face of the Lime Quarries 
at Cibor, 1m, W of Moel-y-don Ferry), all of 
“4 which 
