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Amgueddfa Cymru – Museum Wales
Ordnance survey contoured road map of Pontypridd & Barry, sheet 109, popular edition. The map has been hand-marked to show the positions of all gas and electricity undertakings in South Wales. Colour printed map, folded, with illustrated cover. The map has been hand-marked with coloured ink, with a handwritten reference key attached to the bottom left hand corner. The map was once the property of the Powell Duffryn Limited Chief Electrical Engineers Office, Ystrad Mynach. Scale 1": 1 mile Revised (3rd revision) 1913 - 1920
