There are 32 items in this collection, the majority of which are correspondence between Frederick the Great of Prussia and Voltaire. In the letters between Frederick and Voltaire, they discuss such topics as religious freedom and freedom of expression in France, the Catholic Church, the Seven Years War, the War of Austrian Succession, the health of Voltaire, and the talent and skill of both men in writing poetry. There are also some other letters from Voltaire to various friends including the Derrey de Rocqueville, who was a lawyer in the Parliament of Toulouse. These letters again discuss religious matters, certain legal cases where a French citizen was unjustly prosecuted for being of the wrong faith, and the health of Voltaire. Three pages of poems are also included in this collection, all written by Voltaire, and which include flowery language, many metaphors, and references to mythological characters and gods. Several of the letters are signed by Voltaire. All of Frederick the Great's letters are signed by him.