Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
O.S. map of Brecon
Ordnance Survey of England and Wales, Brecon sheet 213. Scale of One inch to a Statute Mile = 1/63360. Hand coloured.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.