Trimsaran (Trim)
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
Cwmorthin Remembered documentary (with subtitles)
Cwmorthin Remembered documentary
The Slate Industry