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    Oblique aerial photograph of Pen-yr-Orsedd slate quarry and blondins, taken from the north east during the Royal Commission’s programme of archaeological aerial reconnaissance by Toby Driver on 12th January 2022Further Information
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    NPRN33734TitlePen yr Orsedd Slate Quarry Blondin, Nantlle ValleyType Of SiteENGINE HOUSECollections5Images2