Rhiwgreiddyn slate quarry. 2017.
An Interview with John Roberts
Model of a Slate Cutter's Barrow,...
W J Roberts' death certificate, Bangor,...
William John Roberts (1906 – 1982), Bethesda
Chwarel y Penrhyn, by W. J. Roberts
Meillionen', Pant, Bethesda, Gwynedd
W.J. Roberts and M. M. Roberts, Penrhyn Quarry,...
A 'Biology' class at Ysgol y Sir,...
The site of Treflys Chapel, Gerlan, Bethesda,...
Ponc Twrch Office, Penrhyn Quarry, Bethesda,...
Ponc Leval Shed, Penrhyn Quarry, Bethesda,...
Vol.1 of a manuscript of the history of Penrhyn...
Vol.2 of a manuscript of the history of Penrhyn...
Vol.1 (transcription) of a manuscript of the...
Vol.2 (transcription) of a manuscript of the...
Index pages of a manuscript of the history of...
A collection of photographs of Merched y Wawr,...
Carved slate
Decorated Slates of Dyffryn Ogwen
Decorated slate with concentric circles
Decorated slates
Hands carved from slate
Piece of decorated slate
Decorated slate (both sides)
Slate frame
Slate coffer with circles
Slate with pattern
Slate sun dial
One of three sections of possible fire place
