Julian Cope presents Head Heritage

Colonel Hawley was an officer in the Royal Engineers so would be more than capable of surveying work, and Robert Newall, his assistant, was a draughtsman from the Office of Works. So the required skills were there although whether or not they were applied conscientiously is another matter.

I don't know if the last paragraph of the following is of interest to you ?

http://en.wikipedia.org/wiki/William_Hawley