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Expence $ and this increafing Difficulty of procuring 
it has been the Reafon of its riling in its Price to 
that it is now fold at, which is five Shillings a 
Bufhel in London 5 but which is not to be wonder'd 
at, fince on the Spot the Quantity that makes a 
thoufand Bricks, which us'd to coft is . and Sd . now 
cofts ioj. the Digging, and will every Year coft more 
and more, unlefs a new Stratum of it fhould be dif~ 
cover'd fomewhere thereabouts, which their many 
unfuccefsful Trials make them at prefent defpair of. 
It is to be obferv'd, that this valuable Earth forms 
but a fingle Stratum , and that does not rife and dip 
with the Elevation and Defcent of the Hill* as the 
Strata of the Earth, Stone, <&c. in Hills ufually do, 
but feems to be even and flat at its Bottom 5 for the 
higher up the Hill they open their Pits, the deeper 
in proportion they find the Stratum of Loam lie. 
It is worthy Obfervation, that this Hill appears 
from this not to have been form'd as the Hills and 
Mountains on the Earth in general have been by a 
Difruption and Elevation of the Strata by Violence 
from within the Earth s for, in that Cafe, this Stra- 
tum of Loam muft have been elevated with them, 
and would have been as near the Surface, or nearly 
fo, in one Part of the Hill as in another, and need 
have been dug for no deeper from the Top than from 
any other Part 5 whereas, on the contrary, it appears 
to lie flat and level underneath the whole Mafs of 
Earth, which makes the Hill, and was, in all Proba- 
bility, the Surface, on the firft Settling of the ter- 
reftrial and other Matter from among the Waters 
of the Deluge. 
The 
