Owd Git - superstitions in mines were discussed in an earlier topic on the forum i.e. "Ghosties" - started by Simonl on 12/07/2007 - read my entry for 04/12/2008 where I've gone into detail about some of the superstitions that I could find. Regarding the superstition of whistling down a mine, Nellie Kirkham told me that she thought it had it's roots in Cornwall, with the Cornish miners migrating at later dates to the Derbyshire lead field, bringing with them the expression of "captain of the mine" whom Derbyshire lead miners would have called "overseers", "captain" being a seafaring term, ships were very superstitious regarding whistling, also having women onboard. She also thought the use of measuring Derbyshire lead mine shafts in fathoms derived from this origin too, but when I put up this query on the "mining history" website I was told that the practice of measuring in fathoms derived from Derbyshire - the UK's most land locked county! Remember too that miners from all metal mining areas of the UK have at one time or another migrated around the country, hence the common mining glossary that exists between all fields and possibly superstitions. Many Derbyshire miners were sent by the King to work silver mines in Devon in the 1200/1300's - I've forgotten the exact date. However, I've never heard of burning heather in the Derbyshire lead mines as mentioned by AR, that has me puzzled.
I looked up in Jim Rieuwerts " Glossary of Derbyshire Mining Terms" page 178 under Superstitions which mentions "Brown Hen - fairies butter - ghurr - thurr - Burning Drake - divining rod - Banedog - chance being - knocker - Christmas Eve candle - fairy pipes - fairy rings - foot ale and Mine Folk."
Perhaps "History Trog" can add to the list.
Sorry for lack of contact but have been ill since New Year.