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
Letter of advice from J.M Horsely (H.M. Inspector of Mines) to E. Ivor David, concerning Gt. Mountain Colliery sealing cable dielectric. On cream coloured Mines Department headed paper, typed in black ink on both sides of the paper. Dated 7th July, 1927. Attached to 83.184I/25 (1) and 83.184I/25 (2) with a staple.
