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    RCAHMW colour oblique photograph of Maen-Offeren slate quarry, Blaenau Ffestiniog. Taken by Toby Driver on 08/02/2011.Further Information
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    NPRN400427TitleMaenofferen Slate Mine, Blaenau Ffestiniog (Maen-Offeren; Maen y Fferem; Maen Offeren)Type Of SiteSLATE QUARRYCollections144Images135