The Groundplot of the work, as when first built, in a greater form,
with the foure equilaterall triangles making the _Scheame_, by which
the whole work was composed.
_H_
The six principall entrances, three whereof directly opposite to those
of the Trench.
_I_
The stones which made the outward Circle, seven foot in breadth; three
foot and an half thick, and fifteen foot and an half high: each stone
having two tenons mortaised into the _Architrave_, continuing upon
them, throughout the whole circumference. For, these _Architraves_,
being joynted directly in the middle of each of the perpendicular
stones that their weight might have an equall bearing, and upon each
side of the joynt a tenon wrought, (as remains yet to be seen) it may
positively be concluded thereby, the _Architrave_ continued round about
this outward circle.
_K_
The smaller stones of the inner circle, one foot and an half in bredth,
one foot thick, and six foot high. These had no _Architraves_ upon
them, but were raised perpendicular, of a pyramidall form. That, there
was no _Architrave_ upon these, may be hence concluded, the stones
being too small to carry such a weight, the spaces being also too wide,
to admit of an _Architrave_ upon them without danger of breaking, and
being but six foot high, there could not, possibly, be a convenient
head-height remaining for a passage underneath, especially, considering
fully the greatnesse of the whole work.
_L_
The stones of the greater _Hexagon_, seven foot and an half in breadth,
three foot nine inches thick, and twenty foot high, each stone having
one tenon in the middle.
_M_
The stones of the _Hexagon_ within, two foot six inches in breadth, one
foot and an half thick, and eight foot high, in form pyramidall, like
those of the inner circle.
• • • • •
The Scale which hath this mark, _X_, is of thirty foot, by which
likewise all the ensuing _Designs_ are drawn.
• • • • •
The _Design_ follows.
[Illustration]