Trimsaran (Trim)
Cloddiad Pen y Bryn Excavation
Names of Dyffryn Nantlle Slate Quarries Artwork
Rhiwgreiddyn Quarry
Nantlle Railway tunnel, Dorothea Quarry
Dororthea Quarry Beam Engine
Inscription of JER with a partial date
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