7th Paragraph regarding the renewal of the BSA lease for the Easegill system.
http://www.rrcpc.org.uk/easegill/text/History.htm
[quote author=RRCPC (and George Cornes of No 1, Cornes Cavern)]
Accordingly, it was decided that a metal lid should be fitted to the Lancaster Hole shaft. [/quote]
Though the chemical persuasion may be artistic licence, see later paragraph...