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X/Dorothea/1518-1581

Plans

Item TitleDescriptionArchive Date
X/Dorothea/1548 Geological Map of Nantlle Valley Quarries and North Nantlle slate belt.  n.d.
X/Dorothea/1549 Geological plan of Nantlle Slate area showing fault lines - exposures of rock etc..   
X/Dorothea/1550 Part of geological plan of Nantlle Quarries showing exposures and fault lines.  n.d.
X/Dorothea/1551 Geological plan of Cambrian slate belt of Nantlle.  n.d.
X/Dorothea/1552 MAP of slate veins, from the River Llyfnwy to Braich Quarries; by F.G. Roberts. Plans and sections showing effects of flooding and denudation of rocks.  n.d.
X/Dorothea/1553 Williams Jones Geological Survey: Penybryn Slate Quarry. Plan and sections showing geological structure of rocks.  n.d.
X/Dorothea/1554 PLAN of Penybryn Quarries.  n.d.
X/Dorothea/1555 PLAN (?tunnels at Penybryn).  n.d.
X/Dorothea/1556 DIAGRAM: Penybryn water tunnel.  n.d.
X/Dorothea/1557 PLAN of part of Penybryn Quarry and engine house site.  n.d.
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In accord with normal archival practice in Wales, details of documents are presented in the language of the document. Where details appear in Welsh, then Welsh is the language in which the document is written; where they are in English, the document is in English.