Photograph of Owen Roberts
Hendreddu Quarry Workshops 1920
Slate Workers in Hendreddu chamber 1920s
Names of Dyffryn Nantlle Slate Quarries Artwork
Nantlle Railway tunnel, Dorothea Quarry
Inscription of JER with a partial date
Dororthea Quarry Beam Engine
Abergynolwyn, village and incline
Penyrorsedd
Dorothea Quarry Boilers
Twll Coch, Dorothea quarry
Then and now: Barry Docks