You got me thinking if there was a connection underground between the Old Shilbottle Colliery (Longdyke) and the 'new' (Grange Pit) - don't think so from my sketch of the workings.
Anyway, inspired, I've spent hours making the map below of the workings in the Shilbottle seam superimposed on a copyright expired OS map. (I can't use a more recent one so some of the newer roads are missing on here)
Hope you like it
I've marked the position of Longdyke shafts on there, but the whole thing is just a sketch, not a detailed plot, but accurate enough I hope.
the red lines are faults.
