The MS copy takes into account the variants introduced in the 1741 London edition of the text. The MS also contains an Italian translation of Morale di principidi Giambatta Commazzi.

Frederick begins by saying that he would like Voltaire’s wandering star to settle because he no longer knows where to find him, adding that he would use all the secrets of astronomy to stop its course, and even draw upon astrology, take up the grimoire, or make invocations to all the gods and devils so that Voltaire could settle close to him. Frederick then compares Voltaire to Ulise, and says that Voltaire is being drawn back to the beautiful Émilie du Châtelet. He then discusses Machiavelli, stating that young people are too old-fashioned in their minds to know everything that has been written about Machiavelli. Frederick then turns to the Henriade, saying that he has not yet had a reply from England but that Voltaire should be assured that this is a resolved matter and that it will be engraved. He adds that he hopes to send further news upon his return from Prussia around 15th August. Frederick states that he does not wish to be an idle prince, and goes on to praise Voltaire’s writing, saying that his writings against Machiavelli have provided him with a lightning bolt with which he can strike down Cesare Borgia. Frederick concludes the letter with a section of verse.

Frederick mentions (and probably expands upon), varied topics such as Machiavellian tactics, marriage contracts, and Mexico.