298 
accuracy of the statement. There is a well, however, on the 
summit of the Tor at D which is said to have passed through the 
Limestone into Coal Measures, and I have no reason to doubt 
the fact. 
Briefly to sum up then, we have in the case of the Tor rock a 
well which passed through the Limestone; we have at Upper 
Vobster a quarry, two wells and the workings of two collieries, 
which, if the evidence is to be believed, have proved the existence 
of Coal Measures at a limited depth beneath the Limestone ; and 
we have at Luckington the! present workings of the Mackintosh 
pit, which have passed under the Limestone from side to side, 
proving that the Coal Measures are continuous beneath. 
In order to show more clearly the facts ascertained with regard 
to the latter area, and to explain more intelligibly my views of 
the whole question, I have prepared a section of strata extending 
from the Mendips at Downhead across the Luckington patch to 
Walton Wood, to which I would ask your particular attention.* It 
shews the Mendips as they are with their central mass of Trap 
and Old Red Sandstone from which the Mountain Limestone dips 
northward at a high angle, and it attempts to give a rude idea of 
the Mendips as they may have existed before denuding agencies 
had washed their higher elevations entirely away. I believe 
Professor Ramsay has, in one of his sections across those hills, 
shewn the denuded strata as a continuously curved arch, and 
estimated their thickness at 4,000 feet. But whatever may have 
happened in other parts of Mendip where lower angles of elevation 
prevail in the Limestone, we can hardly suppose this to have been 
the case in the vicinity of Downhead where the beds are dipping 
at from seventy to eighty degrees. Whether the power exerted 
proceeded from eruptive Trap acting from beneath, or some contrac- 
tion of the earth’s surface, which has folded and crumpled up the 
strata, it has impressed itself strongly on my mind that the 
* See reduced copy of this section appended. 
