The manuscript is a lettre en vers, opening with a twenty-line poem that engages with themes of Greek mythology, spirituality, religion, and Christianity. The author refers to the La Barre affair involving François-Jean Lefebvre de La Barre and Sir Morival, and alludes to violence committed by Christians in the name of the Virgin Mary. The text also offers a critique of the political system of the Polish–Lithuanian Commonwealth, particularly the use of the liberum veto.

According to T. D. N. Besterman, the folios are numbered 40–41.

The author expresses deep concern for the King’s health, noting that the King’s well-being is of greater importance to the world than his own. He requests the King’s continued support for Morival, who seeks rehabilitation and the opportunity to serve more effectively. The author mentions an official declaration condemning the previous unjust judgement against the Chevalier de la Barre, which parallels his hope for justice for Morival. If unsuccessful in France, he suggests that Morival could serve in the Russian army, where conditions would be less barbaric than those surrounding the troubling events in Abbeville.

According to T. D. N. Besterman, the letter was written in 1774.