Funny you should mention Rio Tinto. I have on my lounge floor two crates. These contain the archives collected by Lynn Willies when he was excavating and recording Roman and earlier mining at Rio Tinto in the early 1980s. The article is incorrect in that the earliest mining was at least 1000 years before the Romans. The work done by Lynn was part of a much larger project run by Prof. Beno Rothenburg to look at the earliest mining around the Mediterranean.
My aim, and I'm about half way through the process, is to scan as much of this stuff as possible, and hopefully then deposit the original material at the Museum in Rio Tinto. There is, amongst other stuff, hundreds of photos of Rio Tinto and around going back to 1931. When I have completed the process I would hope to deposit the results of my scanning at, amongst other places, Aditnow.