It is believed that Francesco and Bianca were given small doses of arsenic for several days until it killed them, but the doses were probably too small and given over a too short period of time to be detected in Francesco's facial hair.
Francesco and Bianca were given small doses of arsenic for several days. This was what it is believed. It killed them. The doses were probably too small. This was what it is believed. Francesco and Bianca were given over a too short period of time. This was to be detected in Francesco's facial hair. This was what it is believed.