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X/Dorothea/1518-1581

Plans

Item TitleDescriptionArchive Date
X/Dorothea/1568 25" Ordnance Survey Plan of Nantlle Valley Slate Quarry area with many quarries and adjacent lands marked in colour. Plan endorsed "George Riley, dec’d, Talysarn Slate Quarries".   
X/Dorothea/1569 SECTION: unidentified.  n.d.
X/Dorothea/1570 PLAN of office.  n.d.
X/Dorothea/1571 DIAGRAM: Trigonometical sightings etc. (? for cableways or tunnels).  n.d.
X/Dorothea/1572 Unidentified plan of machinery (pulleys, beams etc.).  n.d.
X/Dorothea/1573 PLAN of proposed new engine room at Dorothea Quarry.  n.d.
X/Dorothea/1574 PLANS: Trigonometical sightings (? of cables or pumping shafts) with respect to Quarry workings and shafts. (Large.)  n.d.
X/Dorothea/1575 DESIGN of Cornish Boiler (by A. Anderton & Sons, Accrington).  n.d.
X/Dorothea/1576 PLAN: Arrangement of engine drive (powerhouse shafting assembly - for National Gas and Oil Engine Company).  n.d.
X/Dorothea/1577 Boiler Plans (2).  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.