Still trying to find out a little more about Penarth Slate Mine, as I understand it the machinery you first come across as the surface workings are reached (if walking up from Llidiart-y-Parc) is likely the remains of a shot saw.
So my question is; what’s a shot saw?
I can find various references to their existence but would love to see some old photos or a description of how these worked.
Any ideas?