The view above shows the waste heaps. Each one would have had a rail track along it for the wagons to go on, to tip the waste over the edge into the used part of the quarry.
We had finished the steepest part of the climb but were still only halfway up! We alarmed dozens of grouse and partridge and a rabbit or two as we trudged up through the heather.
Yes it is a grouse, but digital cameras are slow to start and so most of them got far away before I could aim and focus.
Lead was also mined from seams running through the limestone. This old adit would have followed a seam into the hillside until the lead ran out. It seemed to have been a bivouac for more than one person over the years.
Much of the land and therefore most of the mining companies were owned by the Church of England and so Durham Bishops and church officials were wealthy men. It was very common to use lead for the whole roof of the churches. Some still have a good covering even though the price of lead has led to increased thefts.