Letter listing for 1740–1749
- Voltaire [François Marie Arouet] to Claudine Alexandrine Guérin, marquise de Tencin, 4 January 1742
- Lodovico Antonio Muratori to Alessandro Chiappini, 5 January 1742
- Lodovico Antonio Muratori to Cardinal Fortunato Tamburini, 5 January 1742
- Apostolo Zeno to Lodovico Antonio Muratori, 6 January 1742
- Frederick II, king of Prussia [the Great] to Voltaire [François Marie Arouet], 8 January 1742
- Gabrielle Émilie de Châtelet-Lomont d’Haraucourt, marquise Du Châtelet-Lomont [née Le Tonnelier de Breteuil] to Charles Augustin Feriol, comte d’Argental, 8 January 1742
- Charles Étienne Jordan to Nicolas Claude Thieriot, 10 January 1742
- Voltaire [François Marie Arouet] to René Louis de Voyer de Paulmy d’Argenson, 2nd marquis d’Argenson, 10 January 1742
- Voltaire [François Marie Arouet] to Frederick II, king of Prussia [the Great], c. 10 January 1742
- Alexander Pope to Hugh Bethel, 12 January 1742
- Cardinal Fortunato Tamburini to Lodovico Antonio Muratori, 12 January 1742
- Françoise Paule Huguet de Graffigny [née d’Issembourg Du Buisson d’Happoncourt] to François Antoine Devaux, c. 14 January 1742
- Gabrielle Émilie de Châtelet-Lomont d’Haraucourt, marquise Du Châtelet-Lomont [née Le Tonnelier de Breteuil] to père Pierre Robert Le Cornier de Cideville, abbé Cideville, 14 January 1742
- Alessandro Chiappini to Lodovico Antonio Muratori, 17 January 1742
- Alexander Pope to Ralph Allen, 17 January 1742