carefully examining and comparing together Pieces of 
them both I have now by me) and like thofe too, con- 
fift of regularly cut, loofe, and diftind Joints, placed 
one upon the Top of t'other, but in thefe Refpedts they 
differ ; 
1. That fome of thefe In-land Pillars are of a much 
larger Size than any in the Caufway, being Two Foot and 
a half in Diameter < 
2. That there are only found among tliefe fuch as ha\t 
Three, Four, Five, and Six Sides, none that have Seven 
and Eight like fome of the GiaMts Caufway. 
3. That the Joints of thefe do not obferve that knd of 
Articulation by Cavities and Convexities as thofe of the 
Caufway do, but their upper and lower Surfaces touch 
only in Planes, and they ftand united by means of their 
Weight and Preflure alone, fo that a fmall Force will fe- 
ver them. 
Whether thefe Particulars may be thought fufficient to 
conftitute a fpecifick Difference, or only an accidental 
Variety between the Stone of the Giants Caufway^ and 
of thefe more In-land Villars^ I leave to your greater Ex- 
perience in thefe Inquiries to determine. 
But in the mean time I muft not omit informing you, 
that notwithftanding thofe regular Cavities or RiJingSy 
you fee expreft in the Middle of every one of the Joints 
of the Caufway^ defcribed in the foregoing Table, and 
though I have been aflured by feveral that have been up- 
on the Place, that the like HoSows and Convexities are 
in the Original Stones themfelves ; yet I find by obfer- 
ving the Manner of the CommifTure or way of Articu- 
lation in Six Couple of the feveral forts of Joints of Three, 
Four, Five, Six, Seven, and Eight Sides, which I had 
raifed on Purpofe, and taken out of the Caufway^ as they 
were there naturally fellow'd in Pairs, and w^as at the 
Charge 
