48 Mr. Williams’s Particulars 
and south. It has a moveable index, turning on a pivot 
in the centre ; the circle is divided into 360 degrees, or wise, 
subdivided again into 60', and again into 6", and into ^ths. 
This instrument is called cund-brit , or cranti-brit, but I could 
not learn the use of it. 
D. A double circular wall, with a round pillar in the 
centre, as described by Sir Robert Barker. The floor be- 
ing broken, and uneven, renders the height of the outer wall 
irregular, but it measured from 8 feet 1 inch, to 8 feet 3 
inches ; diameter inside, 27 feet 6 \ inches ; thickness of the 
wall, 2 feet. The inner wall is 18 feet within; thickness of 
this wall, 1 foot 5^ inches. The diameter of the centre pil- 
lar, 3 feet inches. 
At the four cardinal points, on the top of the outer wall, 
are four iron pins, with small holes in them, through which, 
the Pundits say, wires are designed to be drawn at the time 
of observation, which wires intersect each other at the centre 
of the pillar. The tops of both the walls are graduated, or 
divided into degrees ; and it is said, that by the shadow of 
these wires falling on the walls, the sun’s declination is 
found. 
In addition to the foregoing, which are described in the 
plates alluded to, on the south-east quarter of the building 
is a large black stone, 6 feet 2 inches diameter, fronting the 
west ; it stands on an inclined plane. I could not learn the 
use of this instrument ; but was informed that it never had 
been completed. There is no other building of any conse- 
quence, nor does it appear there ever was. 
I fear, that from the want of sufficient knowledge of the 
science of astronomy, I have not been able to describe the 
