Letter listing for 1770–1779
- Jean Jacques Rousseau to Madeleine Catherine Delessert [née Boy de la Tour], March 1774
- Jean Jacques Rousseau to Jacques Henri Bernardin de Saint-Pierre, March 1774
- Sophie Durey de Verven to Voltaire [François Marie Arouet], 1 March 1774
- David Hume to William Strahan, 1 March 1774
- Voltaire [François Marie Arouet] to Catherine II, czarina of Russia [the Great], 2 March 1774
- Voltaire [François Marie Arouet] to Gaspard Henry Schérer, 2 March 1774
- David Hume to Sir William Forbes of Pitsligo, 6th baronet, 3 March 1774
- Jeremy Bentham to Sir Samuel Bentham, 4 March 1774
- Voltaire [François Marie Arouet] to Maréchal Louis François Armand de Vignerot du Plessis, 3rd duc de Richelieu, 4 March 1774
- Marie Anne de Vichy-Chamrond, marquise Du Deffand [née de Vichy] to Horace Walpole, 4th earl of Orford, 5 March 1774
- Voltaire [François Marie Arouet] to Jean Le Rond d’Alembert, 5 March 1774
- Voltaire [François Marie Arouet] to François Louis Claude Marin, 5 March 1774
- Voltaire [François Marie Arouet] to Frederick II, king of Prussia [the Great], c. 5 March 1774
- Marie Jean Antoine Nicolas de Caritat, marquis de Condorcet to Voltaire [François Marie Arouet], 6 March 1774
- Voltaire [François Marie Arouet] to Philippe Antoine de Claris, marquis de Florian, 7 March 1774
