NPRNTeitlMath O SaflePerthynasNPRN422647TeitlHolyhead Breakwater RailwayMath O Saflen/aPerthynasConsists ofNPRN310333TeitlHolyhead Breakwater Quarries and BrickworksMath O Saflen/aPerthynasAssociated withNPRN41259TeitlHolyhead Breakwater LighthouseMath O Saflen/aPerthynasConsists of
