Letter listing for 1730–1739
- Voltaire [François Marie Arouet] to Frederick II, king of Prussia [the Great], c. 1 July 1738
- Claude Adrien Helvétius to Charles Pierre de Mondion de Montmirel, 2 July 1738
- père Pierre Robert Le Cornier de Cideville, abbé Cideville to Voltaire [François Marie Arouet], 3 July 1738
- père Pierre Robert Le Cornier de Cideville, abbé Cideville to Gabrielle Émilie de Châtelet-Lomont d’Haraucourt, marquise Du Châtelet-Lomont [née Le Tonnelier de Breteuil], 3 July 1738
- Nicola Tacoli to Lodovico Antonio Muratori, 3 July 1738
- Voltaire [François Marie Arouet] to M. — Cousin, 3 July 1738
- Voltaire [François Marie Arouet] to père Bonaventure Moussinot, abbé Moussinot, 3 July 1738
- Voltaire [François Marie Arouet] to M. — Berger, c. 3 July 1738
- Voltaire [François Marie Arouet] to Charles Augustin Feriol, comte d’Argental, 5 July 1738
- Voltaire [François Marie Arouet] to père Bonaventure Moussinot, abbé Moussinot, 5 July 1738
- Voltaire [François Marie Arouet] to Nicolas Claude Thieriot, 5 July 1738
- Aaron Hill to Alexander Pope, 6 July 1738
- Supplément au bail by Claude François Noëray, 6 July 1738
- Gabrielle Émilie de Châtelet-Lomont d’Haraucourt, marquise Du Châtelet-Lomont [née Le Tonnelier de Breteuil] to Pierre Louis Moreau de Maupertuis, 7 July 1738
- Voltaire [François Marie Arouet] to Étienne Ledet & Cie, 7 July 1738