Hi, Prince Charles has mined under peoples homes before!. I do not know if many remember the "The Concord" tin mine which was owned by Charles as the 'Duchey' then owned and still ownes today everything it touches in Cornwall.
I was a supervisor at the mine when it was first put back into operation some years ago. In fact Charles came to visit once ( had to put on clean coveralls!!),. Well we did mine for tin at the mine, and were very good at it, with the direction of the 'great' "Jack Symons" and guys like 'Rodney Flamank', we did mine under peoples houses and drained a few wells,(opps!) There was a time once when I was on night shift, when I had a phone call at about 1:30am. The guy who lived just down the road asked if we had equipment working underground??, I told the guy that we had a drift heading under his property (about 360ft down) and that we had a crew working there right now!, The guy told me that it felt like we had a machine under his floor boards!!. I told him I would come to his place and have a listen. After arriving at the said house about 20mins later. I was led into this guys front room. and I can tell you!! I could not belive that I could hear a 'Eimco' front loader muck machine as clear as day!!, it was so clear it was not funny, I told the guy that I would go back to the mine and halt the work in the drift so that he could get some sleep!!. The next day we found that the ore vein ran right up under the house in the village close by, and acted like a tuneing fork!!, relaying the sound of equipment working under ground, we had to stop working nights in this area and only mined on day shift.
It happens!, and it did at Prince Charles, " Concord Mine"