Letter listing for 1770–1779
- Voltaire [François Marie Arouet] to Maréchal Louis François Armand de Vignerot du Plessis, 3rd duc de Richelieu, 29 July 1774
- Thomas Warton to Reverend Doctor Thomas Percy, bishop of Dromore, 29 July 1774
- Frederick II, king of Prussia [the Great] to Voltaire [François Marie Arouet], 30 July 1774
- Voltaire [François Marie Arouet] to Charlotte Sophia van Aldenburg, countess of Bentinck, 30 July 1774
- Marie Jeanne Riccoboni [née de Heurles Laboras de Mezières] to Sir Robert Liston, 31 July 1774
- Marie Jean Antoine Nicolas de Caritat, marquis de Condorcet to Anne Robert Jacques Turgot, baron de l’Aulne, 31 July 1774
- Louis Gaspard Fabry to Henri Léonard Jean Baptiste Bertin, 31 July 1774
- Voltaire [François Marie Arouet] to Alexandre Frédéric Jacques Masson, marquis de Pezay, July / August 1774
- Jean Jacques Rousseau to Antoine Raymond Jean Gualbert Gabriel de Sartine, comte d’Albi, August 1774
- Antoine Raymond Jean Gualbert Gabriel de Sartine, comte d’Albi to Jean Jacques Rousseau, August 1774
- Claude Gallien de Salmorenc to Pierre Michel Hennin, 1 August 1774
- Voltaire [François Marie Arouet] to Gaspard Henry Schérer, 1 August 1774
- Marie Anne de Vichy-Chamrond, marquise Du Deffand [née de Vichy] to Voltaire [François Marie Arouet], 3 August 1774
- Marie Anne de Vichy-Chamrond, marquise Du Deffand [née de Vichy] to Voltaire [François Marie Arouet], 3 August 1774
- Jeanne Julie Éléonore de L’Espinasse to Marie Jean Antoine Nicolas de Caritat, marquis de Condorcet, either 4, 11, 18 or 25 August 1774
