Moel Fferna slate quarry, Glyndyfrdwy.
Trimsaran (Trim)
Model of a Slate Cutter's Barrow,...
Anonymous: 'The Welsh Settlers in Wicklow&...
Plynlimon Lead Mine
Cloddiad Pen y Bryn Excavation
Names of Dyffryn Nantlle Slate Quarries Artwork
Nantlle Railway tunnel, Dorothea Quarry
Inscription of JER with a partial date
Dororthea Quarry Beam Engine
Cilgwyn, Dyffryn Nantlle
Cwmorthin Remembered documentary (with subtitles)
Cwmorthin Remembered documentary
The Slate Industry
old black and white film showing two men...