I've only had the one trip there, with Miles, so can't comment on the full extent of the mine.
We first explored an upper adit, and found some large chambers, but devoid of any interesting artifacts to look at. Ropes would have been needed to descend.
We next explored a lower adit, to the side of the incline. This proved to be more interesting, several chambers, one incline (flooded at the adit level) and some evidence of the incline winder. Two chambers on from that we cam to a tunnel blocked by a collapse and a flodoed chamber we could not cross. However there was a deflated dinghy in the chamber, so we're intending to go back with a dinghy of our own to explore deeper.
The album pretty much documents everythign I've seen of this mine to date, aside from surface remains, but it was night time when we went so no opportunity to photograph them.
Will certainly post more pics when we revisit the mine, and any other info if I come across any.
my orders are to sit here and watch the world go by