[Note IX.1: =se la svignarono=, _disappeared_, _escaped_.]
[Note IX.2: =agenti di questura=, _police officers_.]
[Note IX.3: =Salomone di Caus=, a celebrated French
engineer, who died about 1626. There is a story to the effect that he
was imprisoned on the charge of insanity.]
[Note IX.4: =Da qualche tempo=, _Some time before_.]