These cookies are absolutely essential for our website to function properly.
We use Google Analytics to measure how you use the website so we can improve it based on user needs.
These cookies may be set by third party websites and do things like measure how you view YouTube videos.
Amgueddfa Cymru – Museum Wales
O.S. map Brecknock Sheet XLIII.14 / Glamorgan Sheet III.14 Showing Wen Plenys, Ystradgynlais and Ynys-y-gernon Collieries, Gyrnos Brickworks and Ynyscedwyn Iron & Steel Works in the Upper Swansea Valley, 1877 Scale : 1:2500
