That's right Ben, there are two distinct lines of open stopes running in parallel. The one we looked at last night is around 100ft deep. We identified the drainage tunnel leaving it but it's half clogged with rotting leaves in waist deep water so we didn't get far enough along to establish whether it joins the main drainage adit below the shaft or further outbye.
Interestingly, there were false floors with openings through into deep water in the stope so they'd clearly been working deeper down and pumping. We haven't seen any sign of a wheel pit on the surface, or anything that look like pump rods so it's all rather intriguing.
Coflein says
"There are signs of other structures associated with the site, notably a horse whim circle, a settling tank and a dressing floor. There is a powder store within a wood to the east of the main workings. There is also an associated leat that provided water to a now destroyed machine house at the mine."
"The true crimefighter always carries everything he needs in his utility belt, Robin"