My coming across the graphite was purely a coincidence. I had set out to Newburn Haugh (a large area of low lying land in a large loop of the River Tyne- in fact "haugh" is old Anglo Saxon meaning flat or marshy land near a river) to explore the old Stella Power station site which was nearby the graphite works. After satisfying my curiosity at the Power station site I followed the river edge to the graphite works site (I didn't know it had been a graphite works at the time).
It was not long before I figured it out as there were numerous chunks of graphite simply lying around, generally of the size I enclosed, but some larger and some molded into shapes like screws and hollow cylinders. There were also large electrode pieces with a shiny, glassy finish - these don't leave a mark on paper.
After several trips I collected around 20kg of the material in total, why? I don't really know I just liked the look of them! Since then (1998/99) the site has been prepared for a large new Business Park and I imagine many other pieces of the graphite probably ended up in the in fill or crushed.