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    Digital Colour photograph of Nant yr Helfa manganese mine taken on 07/01/2009 by P.J. Schofield during the Arenig Fach Upland Survey undertaken by Oxford Archaeology North.Further Information
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    NPRN514902TitleNant Yr Helfa, Manganese MineType Of SiteMANGANESE MINECollections6Images6