NPRNTeitlMath O SaflePerthynasNPRN300495TeitlOffa's Dyke: Llyn-Du, DykeMath O Saflen/aPerthynasAssociated withNPRN306868TeitlWhitford Dyke (Offa's Dyke)Math O Saflen/aPerthynasAssociated withNPRN306866TeitlOffa's Dyke; Clawdd Offa (Main Entry)Math O Saflen/aPerthynasAssociated withNPRN306878TeitlHolywell, Circle, Barrow and Linear EarthworksMath O Saflen/aPerthynasAssociated with
