I’d be surprised if they hadn’t figured out the bellows, and that it hasn’t survived the long burial.
http://classroom.synonym.com/can-melt-gold-propane-7157.html
http://www.wikihow.com/Melt-Gold
http://www.kitco.com/jewelry/meltingpoints.html?sitetype=fullsite
http://nevada-outback-gems.com/Reference_pages/melting_gold.htm
The Kitco chart was interesting. I’d never thought aboult the melt points
of copper, gold and silver being so close together.