I didn't feel I had any input in that, my perspective being more a case of 'the impact of Cornwall on a mining professional', but I'd be curious to know what conclusions they draw.
I would comment that I was in Cornwall in December last, visiting old friends in Stithians among other things, and was most interested in the perceptions of his ( early-20s ) sons on the subject; quite different from when I was there regularly and quite a few families had direct experience of the industry and it was visible day-to-day.
''the stopes soared beyond the range of our caplamps' - David Bick...... How times change .... oh, I don't know, I've still got a lamp like that.