I found a star sapphire in the D'Arnise water closet.

Regarding the art of smoking, I would guess the intoxicating properties of cannabis were discovered during a prehistoric tribal gathering, when someone gathered a bunch of the plant and threw it onto the embers of a dying fire to try and keep it going. As the vapors swirled about, the tribe soon experienced the mind altering properties of THC and interpreted it as communion with the gods. The tribal shaman eventually made the connection to the plant, and quickly monopolized the supply in order to consolidate his/her power. Thereafter, only small amounts were parceled out by the central authority.