Final answer:
During the transformation process, the alchemist and the monk most likely discuss alchemy secrets.
Step-by-step explanation:
During the alchemist's transformation of lead, the alchemist and the monk most likely talk about alchemy secrets. Alchemy was the precursor to modern chemistry and involved trying to transmute substances like lead into gold. The alchemist would have been sharing their knowledge and experiences with the monk, discussing the techniques and theories behind their transformation process.