48 Geological Queries regarding the Basaltic and other 
Troughs, through Haddingtonshire to the Coast south-east of 
Dunbar, and another through Fifeshire, to the Coast SE of St. 
Andrews. 
{t is perhaps not less important, that I should mention to Mr. 
Forster, regarding the other comparison which Mr. Winch has 
truly made, in the page already quoted, between the ‘ Great 
Whin Sill” of Durham and Northumberland, and “*the Toad- 
stone of Derbyshire ;” viz. that the facts ascertained thereon, in 
1807 to 1811, by Mr. Farey, and confirmed by subsequent and 
more minute observations, made by Mr. Elias Hall, as is stated in 
vol.i. of Mr. F’s Derbyshire Report, and in pages 113 to 115 of 
your xliid volume ; these show, that instead of mere local ‘“‘wedge- 
shaped beds of Basalt or Lava,” as the late Mr. Whitehurst (de- 
tuded by the fanciful Plutonic Theory, which he was seeking to 
support) has in some parts of his ‘* Inquiry”’ stated, to exist, un- 
derground, in the Peak Hundreds of Derbyshire, towhich represen- 
tation Mr. Winch seems here alluding ; that on the contrary, the 
Ist or upper Toadsione or Basaltic Rock, to which this “ great 
whin sill”’ seems undoubtedly referable, I think, is a perfectly con- 
tinuous stratum, (although, in places, it is very unequally thick, 
as well as variable in substance) under-lieing the adjacent Coal- 
field, with the intervention of numerous beds of Limestone (of 
the Ist Rock, separated by numerous partings and wayboards of 
Clay), as is also the case (but with considerable variations in 
thicknesses, &c.) completely round, within the Basaltic border of 
the Lothian, Fife, Stirling, and Lanark, &c. Coal-fields, in the 
very extensive and complicated Trough in the Strata, above- 
mentioned: as my Edinburgh Correspondent, alluded to in a 
former Note, has mentioned, from information he had derived, 
from Mr. Farey’s recent researches and statements. 
The concluding part of my 2d Query, in page 124 of the last 
volume, has in part been answered already by Mr. Forster, in 
p. 41 of his “ Treatise,” by his saying, that the “‘ Great whin 
Sill,’ appears at Caldron-snout water-fall, on the Tees River : 
I shall however, be greatly obliged, by his stating-in your work, if 
hecan, all the requested particulars, regarding its dips there,&c. ? ; 
and also, that he will mention, all those particulars, as to the 
Strata above or below it, &c. which are visible in the upper part 
of the Tees valley, from whence he so confidently drew his con- 
clusion, years ago, that this Basaltic mass in Teesdale, is part of 
the.same stratum, which appears at Dufton-fell ?. 
I am sorry Mr. W. F. appears formerly to have paid such slight 
attention to the fossil Shedés, in the Ironstone balls, in the Shales, 
and in the Limestone, &c. interlaying the Coal-seams; because, 
I can assure him, that these Shells, may be made the. most im- 
: portant 
