NPRNTeitlMath O SaflePerthynasNPRN33505TeitlMaerdy Colliery;Mardy CollieryMath O Saflen/aPerthynasAssociated withNPRN402666TeitlMaerdy VillageMath O Saflen/aPerthynasAssociated withNPRN80553TeitlMaerdy Collieries: No.3 Pit and No.4 Pit, MaerdyMath O Saflen/aPerthynasAssociated with
