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.
Photocopy of two sheets of A4. Black print on white paper. Extract from 1929 G.W.R. internal annual report (unpublished) which provided output data for selected South Wales collieries.
