NPRNTeitlMath O SaflePerthynasNPRN309770TeitlBryntail Mine, Dressing FloorsMath O Saflen/aPerthynasAssociated withNPRN33989TeitlBryntail Lead Mine;Glyn MineMath O Saflen/aPerthynasAssociated withNPRN33997TeitlBryntail Mine, Gundry's ShaftMath O Saflen/aPerthynasPart of