12th January 2012, 11:49 AM
Oxbeast Wrote:@pdurdinI would say those fit under point 1, and it becomes a matter of scale of the work required.
There is also another category, that of 'known unknowns'; where there is some information that a site is/might be there, with a stab at dating, but nothing else is known. Therefore of some value, but unknown in significance.