William John Roberts (1906 – 1982), Bethesda
Chwarel y Penrhyn, gan W. J. Roberts
Swyddfa Ponc Twrch, Chwarel y Penrhyn, Bethesda...
Shed Ponc Leval, Chwarel y Penrhyn, Bethesda,...
Cyf.1 o lawysgrif am hanes Chwarel Penrhyn,...
Cyf.2 o lawysgrif am hanes Chwarel Penrhyn,...
Cyf.1 (trawsgrifiad) o lawysgrif am hanes...
Cyf.2 (trawsgrifiad) o lawysgrif am hanes...
Tudalennau'r mynegai ar gyfer llawysgrif am...
Geographical and Geological Maps, Hook,...
Chepstow Castle
Craig y Ladron - The Thieves Precipice
Crickhowell, Breconshire
Waterfall, North Wales
Conway Castle
The Valley of Nant Ffrancon, Caernarvonshire
Pwll Cwn
Chepstow Castle on the Wye
The Slate Quarries at Bron Llwyd
View of the Rhydaer
Specimens of Rocks. Proof of an Illustration...
Rocky Landscape in Wales
Sir Andrew Ramsay
The Reverend William Buckland, D.D. F.R.S ...
Mr. Jameson
Arthur Aikin Esq.re F.L.S. Cor. Acad. Dij...
The Late Professor Phillips
Sir Warington Wilkinson Smyth
Photographs of the Cardiff Naturalists'...
Invitation to a Reception at the National...