Cambridge.
233. _Broad Arrow or Arrow Head._--What is the origin of the arrow head
as a government mark?
[Arrow symbol]
234. _Deep Well near Bansted Downs._--Mr. Robert Hooke, professor at
Gresham College, writing in 1674, says he has--
"seen at a gentleman's house, not far from Bansted-Downs in
Surrey, a well which is dug through a body of chalk, and is near
360 feet deep, and yet dry almost to the very bottom."
Is this well still known, and can any of your correspondents vindicate
its situation, and give any particulars relating to it? The pamphlet in
which it is mentioned is curious, for it is "an attempt to prove the
motion of the earth [in its orbit] from observations." It will be
observed that the work was written in the year 1674.