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    Oblique aerial photograph of Pen y Bryn slate quarry taken during the Royal CommissionOpsiynau lawrlwytho a prynu
    Manylion
    Hierarchaeth
    Safleoedd Cysylltiedig
    NPRNTeitlMath O SafleArchifauDelweddauNPRN420980TeitlPen-y-Bryn Slate QuarriesMath O SafleCHWAREL LECHIArchifau7Delweddau5