"So then I began what we call the "Lower Work', or Earthly Alchemy. I treated this black mass in the hottest fire, purged it of its imperfections. Then I multiplied it, used it to turn lead ... the basest metal ... into four purer forms: Tin, Iron, Quicksilver and Copper. All the copper, and some of the bronze and brass furniture in here, I made from that source. That bath over there is the best example of my craftsmanship."