Hi. I have a number of ancestors who worked in the coal mines of Derbyshire pre 1910, going as far back as 1850ish. Is there anyway of finding out which mines they worked at ie is there some sort of register? I have searched on the net and cannot find any maps/references to coal mines between these dates, except for a few articles about mining disasters. Family names that I am researching are Wild (or Wilde) and Stocks. Is anybody able to point me in the right direction?