Thanks David you have really added much needed meat to this forum; And apparently given one hell of a shock to the demigods and disciples as well.
Now to 6 miles. 6 x 5280ft = 31,680 find the area of a square with base 31,680 imperial feet in acres = 23,040 acres.
There is our number again 230.4 metres base of GP height / 3.14181818181 = 7,333.3333333.... x 2 = 146.666666 height.
Jim gets it rollright time after time, this paper has been accepted by the European Association of Archaeologists after Jim presented it to them.
Just read it again Jim and it still gives me the chills.
Edited 1 time(s). Last edit at 27-Dec-19 19:24 by DavidK.