NPRNTeitlMath O SaflePerthynasNPRN33909TeitlYstumtuen Lead Mine, YstumtuenMath O Saflen/aPerthynasAssociated withNPRN33821TeitlGwaith Newydd Ystum TuenMath O Saflen/aPerthynasAssociated withNPRN33895TeitlPenrhiw Lead and Zinc MineMath O Saflen/aPerthynasAssociated withNPRN33828TeitlCwmrheidol Mine, CwmrheidolMath O Saflen/aPerthynasAssociated with
