Hi Gang
I have just uploaded a pdf version of the PDMHS bulletin on these soughs (drainage levels) and the mines on Masson Hill. It now out of print and makes interesting reading, including surveys etc that will be of interest to the 'sporting cavers' amongst us. I have made it plain that the copy is for private research and study only and hope that the copywrite proprietors will accept this. I actually know quite a few of them anyway.
I got bored over Christmas and decided to put myself to something useful.
Have a good new year.
RF
My avatar is a poor likeness.