Not as :blink: as you may think, Carnkie! Thank you!
One of my informants used to have all the Penrhyn Quarry Hospital records, which he gave to the archives some years ago. It rang no bells with him, but that doesn't mean to say...!
It seems that Dinorwig "pioneered" anti-sepsis in the way you describe and that Penrhyn, at a later date, did the same with radiography.