William John Roberts (1906 – 1982), 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...