Trimsaran (Trim)
Cloddiad Pen y Bryn Excavation
Names of Dyffryn Nantlle Slate Quarries Artwork
Rhiwgreiddyn Quarry
Nantlle Railway tunnel, Dorothea Quarry
Inscription of JER with a partial date
Dororthea Quarry Beam Engine
Cilgwyn, Dyffryn Nantlle
'The Carved Slates of Dyffryn Ogwen 1830...
Photocopy of rubbing of carved slate
Cwmorthin Remembered documentary (with subtitles)
Cwmorthin Remembered documentary
The Slate Industry