14 
considerably uplifted the measures on the North side of the 
river ; and if this elevation were proved, all the other ap- 
pearances could be shewn to have resulted from violent 
denuding causes, that had operated over a considerable sur- 
face of country Northward. But Mr. Thorp had adduced facts 
to-day which disproved the upraising of the strata on the 
North side only^ and demonstrated that an elevation existed 
on both sides ; for he stated that the difference of level be- 
tsveen the Thick coal at Orgreaves, near Handsworth, and 
the same coal at Elsecar, was onlj' 18 yards, although its 
depression under Attercliffe common was considerable. Sup- 
posing Mr. Thorp's barometrical measurements and other 
data to be correct, the conclusion to be drawn was, either 
that the strata in the valley of the Don had sunk down, 
or that the strata on the North and South sides of it had 
risen up several hundred feet, forming a synclinal axis in 
the vicinity of the river ; and Mr. Morton considered this 
theory more rational, and more in accordance with facts, 
than any other theor)' that had hitherto been advanced. 
The appearances most difficult to explain are local ; they 
are seen in the immediate vicinity of the river between Shef- 
field and Rotherham ; and they are such as to render an in- 
telligible description on paper almost impossible. Plans 
and sections give but a very unsatisfactory explanation of 
the great and sudden turn in the direction of the basset 
edges of the Coal measures in this district, and it is only by 
a model of the country, like Mr. Sop^^^th's model of the 
Forest of Dean, that its very curious and interesting geolo- 
gical features can be fullj^ exhibited. 
Mr. Hartop thought the slight difference in the level of 
the strata at those points proved nothing at all. He should 
not have been surprised had the difference been much less, 
when the length and the fall of the streams from each point 
were taken into account, both of which meet in the river 
Don at Conisbro'. As to there being a basin or trough, he 
