In the letter, the author comments on Prince Augustus Ferdinand of Prussia’s illness, suggesting methods to alleviate its severity and noting the availability of medical care from Dr. Théodore Tronchin. Voltaire then addresses and refutes accusations of unsolicited distribution of a copy of poems authored by Frederick II and addressed to Charles William Ferdinand, Duke of Brunswick. According to T. D. N. Besterman, Caussy wrongly states that the draft is in Wagnière’s hand.