Mr. Farey’s Notes on Mr. Bakewell’s Geology. 259 
[P.267] Derbyshire Fault separating them from Red Marl, Rep. i. 
165, and P. M. xxxix. p. 29: but the existence of which 
fault, Mr. B. questions at p. 212, see my 2d Letter, P. M. 
slii. p. 105. 
1. 11, but appear again t.—{ There are reasons to doubt 
the identity of these Coal-fields, Rep. i. p. xiii. 
1, 12) They are cut off **.—** This may perhaps be 
doubted, see my Note on p. 67. a 
1. 15, coarse breccia and gravel ++.—tt Red Marl strata 
of considerable width, separate these Coal-fields, see my 
Note on p. 67. 
}. 20, red sand rock {¢.—{{ Red Marl, see my 2d Letter, 
P.M. xiii. p. 103. 
268, 1.4 and 5, surrounded by red sand rock *.—* By Red 
Marl, see Phil. Trans. 1811, and P. M. xxxix. p. 28. 
1. 8, South Wales ¢.—t See p. 299, Phil. Trans. 1806, 
Will. Min. King. 2d Ed. ii. 291, and P. M. xl. p. 52.— 
How far is the ‘ gray greenish micaceous sandstone,” or 
Penndard Rock, allied to the Basalt, greenstone, &c., found 
covering several other Coal-fields ? see my Notes on page 
285. 
1. 22 and 23, primary and transition rocks {.— { And 
probably they join them, near Exeter, see my Ist Letter, 
P.M. xli. p. 57% 
270, 1. 7 and 8, hid by the alluvial soil *—* P. M. xxxix. 
p. 30 and 95. 
1. 21, Pontefract is built +.—t Rep. ii. 169. 
271, 1.7, Halifax*.—* On the 3d Grit Rock. 
1. 8, Huddersfield +.—+ On or very near to the 4th Grit 
Rock, P. M. xxxix. p. 102. 
1. 8, Sheffield t.—t On the 9th Grit Rock, Rep. i. 207, 
(Pond’s Colliery). 
272, 1. 6 and 7, immediately upon Lime *.—* I have never 
visited ** Pule Moss,” but have been near “ Stand Edge,” 
on the south-west, and have minutes of the strata per- 
forated by the Huddersfield Canal Tunnel, under the Grand 
Ridge, from two or three Agents or Workmen who were 
employed in the Tunnel; from which I understand, that 
the eastern end of the Tunnel begins in the Ist Coal Shale, 
near the bottom of which, a 15-inch Coal was cut, with 
a pretty rapid eastern dip, which was for some time wrought 
for the supply of the steam engines, then the thick Ist or 
Millstone Grit is penetrated, having the same dip, as had 
also the top of the Limestone Shale under it; but as the 
middle of the Tunnel is approached, the dip diminishes, the 
R2 measures 
