You can find out more by downloading the detailed surveys report here archaeologydataservice.ac.uk/library/brow... and by visiting the Early Mines Research Group page here earlyminesresearchgroup.co.uk/craig%20y%20...
Craig y MwynThe Early Mines Research Group was formed in 1988 by a group of specialist mining historians, geologists, archaeologists and archaeo-metallurgists interested in researching the origins of metal mining...earlyminesresearchgroup.co.uk