NPRNTeitlMath O SaflePerthynasNPRN411077TeitlReservoir, Aberllefenni Slate QuarryMath O Saflen/aPerthynasAssociated withNPRN275917TeitlWater Balance Incline, Aberllefenni Slate QuarryMath O Saflen/aPerthynasConsists ofNPRN268067TeitlAberllyfenni;AberllefenniMath O Saflen/aPerthynasAssociated withNPRN408530TeitlQuarry Office, Aberllefenni Slate Quarry; The Bell HouseMath O Saflen/aPerthynasAssociated withNPRN28145TeitlAberllefenni Slate Quarry, Blue CottagesMath O Saflen/aPerthynasAssociated withNPRN408514TeitlSlate Mill, Aberllefenni Slate QuarryMath O Saflen/aPerthynasAssociated with
