Members of the list may be interested in this, which has just been published by Archive CD Books ( a non profit making organisation). Potts' 1893 Mining Register & Directory covers the whole of Great Britain and Ireland and contains a directory of mine owners, mines and managers listed alphabetically in counties complete with geological maps of each county's coalfields see Books for All Britain page http://www.rod-neep.co.uk/acatalog/all-britain.html