@Nyddfwch Here is the Coal Authority plan of the known pits. Local historians living in Read say that they are aware of many more pits. They follow seams and are about 20 feet from shaft to shaft in the best spots. Apparently the same Roger Nowell sunk (or his miners did) bell pits at Accrington Moor. I am trying to find local historians who can help me locate those bell pits.