As well as several works on hygiene he also wrote: Cirillo visited England and France and his fame reached even the other side of the Atlantic, as attested by his election to the American Philosophical Society in 1768.

A Professor from the University of Naples recently exposed the error and prompted the American Philosophical Society to correct its records after 255 years, thus recognizing Cirillo as its first Italian member.

After at first refusing to take part in the new government, Cirillo consented to be chosen as a representative of the people and became a member of the legislative commission, of which he was eventually elected president.

After a short siege, the Republicans surrendered on what they considered honourable terms: life and liberty being guaranteed them by the signatures of Ruffo, of Foote, and of Micheroux.

Secure under the British flag, Ferdinand and his wife, Marie Caroline of Austria, showed themselves eager for revenge, and Cirillo joined other Republicans in fighting back.