The church where Simone is to wait, Santa Maria Novella, is the same church where the
brigata gathered at the beginning of
The Decameron. The alarming description of the demonic creature that comes to convey him to the secret society’s meeting both sets up the parameters for the prank and stresses the occult, even satanic atmosphere of the society. And although the pair’s warning that failure to observe the rules will land the doctor in a stinking mess sounds like a general caution, their intensifying potty humor foreshadows a rather more specific mess.