In alchemy, base metals that are turned to gold are said to be “transmuted,” and Surly makes a play on this word here, as he claims he can’t be “transmuted,” or transformed into a believer of alchemy. With the plague, a particularly deadly illness, taking over London, it is no wonder that Mammon and others want to believe in the elixir of life, as it is the only sure way to save their lives from the illness. Furthermore, Mammon uses alchemy and the stone to explain biblical stories and ancient myths, like “Irish wood” (St. Patrick’s ability to chase insects out of Ireland), Pythagoras’s brilliance, Pandora’s box, and Jason’s golden fleece.