by J. D. Jones, Llanberis, and on Pant Glas Quarry by Jenkin Humphreys and Price Evans, Llangollen, mineral surveyors.
Reports on Pant Glas and Wynne Slate Quarries
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- ReferenceGB 209 DD/RO/82
- Dates of Creation1882-1886
- Physical Description1 bdle.