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/ Penrhyn Slate Quarry and Bethesda, and the Ogwen valley to Port Penrhyn
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Penrhyn Slate Quarry and Bethesda, and the Ogwen valley to Port Penrhyn
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The Slate Landscape of Northwest Wales
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Penrhyn Slate Quarry and Bethesda, and the Ogwen valley to Port Penrhyn - Most Traveled People
