[<»] 
continual Cultivation has not fupennduced a new 
Soil. Horfetail, and a Species of Wild Trefoil, 
grows out of it very plentifully, efpecially the fil'd, 
which fink their fibrous Roots to a confiderable 
Depth in it : The whole Bed confills of feparate de- 
tached Pieces, in the Nature of thole which you have 
by you, and of levcral Dimenfions, as thofe are, 
moftly long and tubular ; fome few round, with a 
fmall Cavity in the Centre, others quite flat, and 
fome, as it were, excavated on one Side, as if the 
chalky Lamina had extended themfelves round a Piece 
of Bark ; but all of them hollowed within, agreeable 
to their exterior Shape, except very few. 1 believe 
it may be aflerted, with fome Confidence, that this 
Valley formerly was over-run with Wood, it not 
wholly, at lead; for fome confiderable Length and 
Breadth : Wild Boars Tusks, which are known by 
their Length; Stags-horns, and a Flint-knife, which 
have been found buried to fome Depth, in the Malm, 
feem to evince as much. That Trees of confiderable 
Dimenfions have grown in it, is very evident ; for, 
in a Drain, which "they have lately made to convey the 
W ater from the main River to the adjacent Meadows, 
Trees of a vafl Size may be feen, at Two or Three 
Feet Depth, in no fmall Number, retaining both Shape 
and Subftance in fome meafure, though much decayed, 
and not fo compadand folidin thofe Parts, which have 
been expofed to the Water ; thefe lie out of the Verge 
of this Bed of Malm, and are notconfequently affeded 
by it. Now I am much inclined to think, that 
thefe Trees, together with the red of the Wood, 
might, by Age, and fome Accident combining with it, 
have fallen 5 the uppermod might have ferved to bury 
