The ambassador of Ferrara wrote to Duke Ercole that it was no wonder the Pope and the duke were sick because nearly everyone in Rome was ill because of bad air ("per la mala condictione de aere").
Ferrara saadik kirjutas neil päevil Ferrara hertsogile: „Polnud imestada, et paavst ja hertsog olid haiged, sellepärast, et peaaegu kõik olid Roomas haiged halva õhu (mürgise sooõhu) tõttu” ("per la mala condictione de aere").