The Ingenious and Curious Pneumatic Motions of Hero

the Gonzaga Eagles, which have always surpassed the highest spheres of Glory, and have provided not to Jupiter his Thunderbolts, the weapons of celestial vengeance, but to Pallas referring to Athena, goddess of wisdom the innocent splendors of immortality. With which aim, bowing deeply before Your Excellency, I pray to God that He may render propitious the end of all your most righteous desires.

From Bologna, the 22nd of July 1647.

Of Your Most Illustrious Excellency

Most humble and most devoted servant,
Carlo Zenero.