Along time ago, in the Ruhr valley, a young shepherd made a campfire in a pit to warm h imself. His campfire seemed to burn much longer than usual. The next day, he discov- ered shiny black stones amidst the ashes, which were still glowing and burning.
The boy told the farmer who employed him about this and together, when the work in the fields was done, they dug in the Pinge for these black rocks. The deeper they dug, the more nasty pit water appeared, making the digging increasingly difficult. â€¦