the great Derbyshire Denudation. 255 
road, and thence across the pastures to the Lathkil river; the 
sudden elevation of the limestone knowls SW. of Yolgrave, 
near the shale ; and by this same lift, it happens, that the vale 
of the Bradford suddenly cuts through the first lime rock, as 
soon as it has crossed this fault, and shews the first toadstone 
to a considerable height up each side of the valley, but which 
declines with the dip of the measures in this tract, until the 
Bradford again gets upon the first toadstone, and then on the 
first limestone. In like manner, the greater rise of the mea- 
sures at this fault, on the SW. of Over^-Haddon village occa- 
sions the valley of the Lathkil river, which till then had been 
excavated in the first lime rock, to enter abruptly so deep 
into the first toadstone, as to lay bare a patch of the second 
limestone under it in the river, both of which however de- 
scend again below the bed of the river, before we get down 
to the crossing of the Ashburne turnpike road. 
This fault also occasions the sudden appearance of shale- 
limestone on the surface NW. of it, opposite to first limestone 
on the other side in Bakewell Fields, and of the first toad- 
stone on the NW. of Bakewell Cotton-Mill, almost excavated 
through by the vale of the Wye river, where it abuts against 
shale or shale-limestone at the northern end of this noted 
patch of toadstone, the situation and circumstances of which, 
when compared with those of the other two patches, at the 
edge of this same raised tract, as above, will be divested of 
much of that singularity which has been ascribed to it ; for 
we see, that each of the three rivers, which pass on to this 
fourth inner raised tract, have their excavations cut through 
the first limestone, so as to expose the first toadstone for some 
distance, until the more rapid descents of the measures than 
