Letter listing for 1750–1759
- Voltaire [François Marie Arouet] to Frederick II, king of Prussia [the Great], 9 July 1751
- Voltaire [François Marie Arouet] to Charles Augustin Feriol, comte d’Argental, 13 July 1751
- Greve Carl Fredrik Scheffer to Marie Anne de Vichy-Chamrond, marquise Du Deffand [née de Vichy], 14 July 1751
- Voltaire [François Marie Arouet] to Frederick II, king of Prussia [the Great], 14 July 1751
- Charles Louis de Secondat, baron de Montesquieu to Marie Anne de Vichy-Chamrond, marquise Du Deffand [née de Vichy], 15 July 1751
- Voltaire [François Marie Arouet] to Frederick II, king of Prussia [the Great], c. 15 July 1751
- Voltaire [François Marie Arouet] to Frederick II, king of Prussia [the Great], 16 July 1751
- Voltaire [François Marie Arouet] to Frederick II, king of Prussia [the Great], 16 July 1751
- Voltaire [François Marie Arouet] to François Antoine Devaux, c. 16 July 1751
- Greve Carl Fredrik Scheffer to Marie Anne de Vichy-Chamrond, marquise Du Deffand [née de Vichy], 18 July 1751
- Voltaire [François Marie Arouet] to Charlotte Sophia van Aldenburg, countess of Bentinck, 18 July 1751
- Claude Adrien Helvétius to Renée Caroline Victoire de Froullay de Tessé, marquise de Créquy, c. 19 July 1751
- Claude Adrien Helvétius to Marie Thérèse de Larlan de Kercadio, comtesse de Rochefort [née de Brancas], 19 July 1751
- Nicolas René Berryer de Ravenoville to [unknown], 20 July 1751
- Charles Benjamin de Langes de Montmirail, baron de Lubières to Marie Charlotte Saladin, c. 20 July 1751