16 
be taken, (for instance, from Iccles Hall, or any place conti- 
guous to the river, and prolonged as far only as Keppel's 
column,) but then part only of the disturbed district is passed 
over ; and because he had studied, and yet recommends to 
be studied, only the small tract of country adjoining the 
river, and not rather to consider the general effect which 
these enormous disturbances have upon the disposition of 
the strata of the whole country, it hence arose that we all 
left the former discussion of the subject, under the erro- 
neous impression that the whole country was elevated to the 
above amount, and maintained that elevation Northwards 
through Yorkshire, which has been proved perfectlj' incor- 
rect in the paper, by an inquiry into the difference of eleva- 
tion above the sea of the same coal at Elsecar, near Went- 
worth House, and at Orgreave, on the borders of Derbyshire. 
Mr. Hartop, however, yet thinks that " the slight difference 
in level proved nothing at all ;" but it proved everything 
which he (Mr. Thorp) required, viz., that the vertical ele- 
vation of 700 yards is only local, and that there is no verti- 
cal elevation of the beds of the whole country on the North 
side of the Don above those of the South. But Mr. Hartop 
still says, that " as to there being a basin or trough, he 
thought that there was no intimation of anything of the 
kind." Now, that there is a South side of the basin, or rise 
of beds to the South, has been proved in my paper by — 1st, 
a section in the Sheffield coal ; 2nd, by one in the Thick 
coal ; 3rd, by that of the North Midland Railway ; 4th, by 
that of the Gannister and Pecten coal ; 5th, by that of the 
Hallam coal ; 6th, by a consideration of the position of the 
High Hazles coal, at Swallow Nest and at High Hazles ; 
7th, by that also of the Thick coal at Beighton and at Atter- 
cliffe, and its position vriih regard to the two railways. And 
that there is a North side of the basin, or rise of beds to the 
North, has been proved — 1st, by a sight of the beds any- 
where on the Sheffield and Rotherham Railway ; 2nd, by a 
