Wil Williams (Berth), William Williams (his uncle) (Ty'n y Maes), Owen Jones (Bryntirion) Type Item Uploaded by Lleisiau Lleol Dyffryn Ogwen
Presentation titled 'Atgofion William John, Pant' to Cymdeithas Hanes Dyffryn Ogwen, 2024 Type Item Uploaded by William John Roberts (1906-1982)
William John Roberts (1906 – 1982), Bethesda Items 7 items Type Story Uploaded by William John Roberts (1906-1982)
Chwarel y Penrhyn, by W. J. Roberts Items 5 items Type Collection Uploaded by William John Roberts (1906-1982)
Vol.1 of a manuscript of the history of Penrhyn Quarry, Gwynedd, by W. J. Roberts, c.1970 Type Item Uploaded by William John Roberts (1906-1982)
Vol.2 of a manuscript of the history of Penrhyn Quarry, Gwynedd, by W. J. Roberts, c.1970 Type Item Uploaded by William John Roberts (1906-1982)
Vol.1 (transcription) of a manuscript of the history of Penrhyn Quarry, Gwynedd, by W. J. Roberts, c.1970 Type Item Uploaded by William John Roberts (1906-1982)
Vol.2 (transcription) of a manuscript of the history of Penrhyn Quarry, Gwynedd, by W. J. Roberts, c.1970 Type Item Uploaded by William John Roberts (1906-1982)
Index pages of a manuscript of the history of Penrhyn Quarry, Gwynedd, by W. J. Roberts, c.1970 Type Item Uploaded by William John Roberts (1906-1982)
Penrhyn Quarry Items 8 items Type Collection Uploaded by Teithwyr Ewropeaidd i Gymru, 1750-2010 // European Travellers to Wales, 1750-2010
Penrhyn Quarry, 1913 Type Item Uploaded by Rhyfel Byd Cyntaf: Prosiect Addysg - First World War: Education Project
Penrhyn slate quarries, near Bangor Type Item Uploaded by Llyfrgell Genedlaethol Cymru / The National Library of Wales
