Letter listing for 1730–1739
- Voltaire [François Marie Arouet] to Pierre Louis Moreau de Maupertuis, 22 May 1738
- Voltaire [François Marie Arouet] to Pierre Louis Moreau de Maupertuis, 25 May 1738
- Gabrielle Émilie de Châtelet-Lomont d’Haraucourt, marquise Du Châtelet-Lomont [née Le Tonnelier de Breteuil] to Françoise Paule Huguet de Graffigny [née d’Issembourg Du Buisson d’Happoncourt], c. 27 May 1738
- Voltaire [François Marie Arouet] to père Bonaventure Moussinot, abbé Moussinot, 30 May 1738
- Thomas Gray to Richard West [junior], June 1738
- Nicola Tacoli to Lodovico Antonio Muratori, 3 June 1738
- Voltaire [François Marie Arouet] to père Bonaventure Moussinot, abbé Moussinot, 5 June 1738
- Voltaire [François Marie Arouet] to Nicolas Claude Thieriot, 5 June 1738
- Filippo Argelati to Lodovico Antonio Muratori, 6 June 1738
- Ridolfino Venuti, abate Venuti to Lodovico Antonio Muratori, 7 June 1738
- Frederick II, king of Prussia [the Great] to Voltaire [François Marie Arouet], c. 10 June 1738
- Edward Harley, 2nd earl of Oxford to Jonathan Swift, 10 June 1738
- Filippo Argelati to Lodovico Antonio Muratori, 12 June 1738
- Voltaire [François Marie Arouet] to Charles Augustin Feriol, comte d’Argental, 12 June 1738
- Voltaire [François Marie Arouet] to père Bonaventure Moussinot, abbé Moussinot, 12 June 1738