326 Mr. Farey’s Notes on Mr. Bakewell’s Geology. 
[P.275] a soft Coal, generally of five yards thick, the next a hard 
Coal, mostly of two yards thick, and the lower one is usually 
three quarters of a yard thick. Clunch or fire Clay occurs 
under each of these three Coals, as usual (Rep. i. 179 and 
446 and P.M. xliii. p. 28), and Shale, Bind and Gritstone 
beds on and between them ; altogether these Coal-measures 
~ seem about 150 yards thick : below the three-quarter seam, 
there is a thickness—perhaps 40 yards, of barren Coal-mea- 
sures, in which, although the appearances are very pro- 
mising and have induced several trials, seams of sufficient. 
thickness to work, are rarely met with. Below this occur 
what I have denominated the Floor Rocks of the Anglesea 
Coal-trough, (vol. xlii. p. 356 and 360) and seem together 
to be about 90 yards thick, consisting of a variably and very 
coarse Gritstone with Jasper fragments in it occasionally; 
below which is a gray Limestone Rock (very cherty and bad 
in quality in Llanfihangel) ; then the middle coarse Gritstone 
Rock, often containing huge massesof Chert (as Graig-fawr, 
vol. xliii. p. 126) and Jasper fragments, coaly masses, &c. 
Below this the black Limestone or (Kilkenny) Marble Rock 
in thin beds, occurs; and then the lower variously coarse Grit 
Rock, graduating locally into Conglomerate, see my Note on 
p- 202; and then the coarse Slate succeeds. Both the Lime- 
stone Rocks above mentioned, are I believe included in the 
Halkin or highest of the three Limestone Rocks mentioned, 
vol. xlii. p. 53, 59, &c.; in which case, they would with more 
propriety perhaps be called four Rocks of Limestone, that 
surround, and basset on more than three sides of the slaty 
mountains of Wales. And, if these are classed with the four 
Limestones of the Peak of Derbyshire, what very anomalous 
substances must we not admit, in the places of its three 
Toadstones ?. 
277, 1.8, Hills in Derbyshire are *, — * Blakelow-stone ‘is 
probably the highest ; higher than Holme-moss, see my Notes 
on p. 272 and 278: Whin Hill and Mam Tor here men- 
tioned, are inferior in height to several that surround them; 
Lords Seat near, at hand, over-looks them both. 
278, 1. 21, has omitted the height *.—* Not exactly so, since 
the height of Axe-edge N hill is said to be 1875 feet, Rep. 
i. 17; at the time my volume was published, the List of a/- 
titudes in the “* Account of the Trigonometrical Survey from 
1800 to 1809,” had not appeared: and even in this work, 
some difficulties arise, from Axe-edge and Lords-Seat, 
distant 49,2121 feet, (p. 128) and bearing about 31° 42’ 
13” E of the N, being each stated tu be. 1751 feet above 
the sea (p. 302 and 308); although, at Axe-edge, sc 
: eat 
