Letter listing for 1730–1739
- Voltaire [François Marie Arouet] to père Pierre Robert Le Cornier de Cideville, abbé Cideville, 11 October 1739
- père Pierre Robert Le Cornier de Cideville, abbé Cideville to Voltaire [François Marie Arouet], 12 October 1739
- Gabrielle Émilie de Châtelet-Lomont d’Haraucourt, marquise Du Châtelet-Lomont [née Le Tonnelier de Breteuil] to Frederick II, king of Prussia [the Great], 13 October 1739
- Thomas Gray to Dorothy Gray [née Antrobus], 13 October 1739
- Françoise Paule Huguet de Graffigny [née d’Issembourg Du Buisson d’Happoncourt] to François Antoine Devaux, c. 15 October 1739
- Françoise Paule Huguet de Graffigny [née d’Issembourg Du Buisson d’Happoncourt] to François Antoine Devaux, c. 15 October 1739
- Voltaire [François Marie Arouet] to Claude Adrien Helvétius, 15 October 1739
- Voltaire [François Marie Arouet] to père Pierre Robert Le Cornier de Cideville, abbé Cideville, 15 October 1739
- Voltaire [François Marie Arouet] to père Pierre Robert Le Cornier de Cideville, abbé Cideville, 15 October 1739
- Voltaire [François Marie Arouet] to Claude Adrien Helvétius, c. 15 October 1739
- Voltaire [François Marie Arouet] to père Pierre Robert Le Cornier de Cideville, abbé Cideville, 15 October 1739 [translation from French into English]
- Françoise Paule Huguet de Graffigny [née d’Issembourg Du Buisson d’Happoncourt] to François Antoine Devaux, c. 16 October 1739
- Voltaire [François Marie Arouet] to Jeanne Françoise Quinault, 16 October 1739
- Filippo Argelati to Lodovico Antonio Muratori, 18 October 1739
- Voltaire [François Marie Arouet] to Frederick II, king of Prussia [the Great], 18 October 1739