Letter listing for 1740–1749
- Gabrielle Émilie de Châtelet-Lomont d’Haraucourt, marquise Du Châtelet-Lomont [née Le Tonnelier de Breteuil] to Jean François de Saint-Lambert, marquis de Saint-Lambert, 15 February 1749
- Gabrielle Émilie de Châtelet-Lomont d’Haraucourt, marquise Du Châtelet-Lomont [née Le Tonnelier de Breteuil] to Jean François de Saint-Lambert, marquis de Saint-Lambert, 15 / 16 February 1749
- Pietro Ercole Gherardi to Lodovico Antonio Muratori, 15 February 1749
- Voltaire [François Marie Arouet] to François Thomas Marie de Baculard d’Arnaud, 15 February 1749
- Françoise Paule Huguet de Graffigny [née d’Issembourg Du Buisson d’Happoncourt] to François Antoine Devaux, 16 February 1749
- Voltaire [François Marie Arouet] to Cardinal Girolamo Quirini, 16 February 1749
- Françoise Paule Huguet de Graffigny [née d’Issembourg Du Buisson d’Happoncourt] to François Antoine Devaux, 17 February 1749
- Stanislas I, king of Poland to Gabrielle Émilie de Châtelet-Lomont d’Haraucourt, marquise Du Châtelet-Lomont [née Le Tonnelier de Breteuil] and Voltaire [François Marie Arouet], 17 February 1749
- Voltaire [François Marie Arouet] to Frederick II, king of Prussia [the Great], 17 February 1749
- Voltaire [François Marie Arouet] to Frederick II, king of Prussia [the Great], 17 February 1749 [translation from French into English]
- Gabrielle Émilie de Châtelet-Lomont d’Haraucourt, marquise Du Châtelet-Lomont [née Le Tonnelier de Breteuil] to Jean François de Saint-Lambert, marquis de Saint-Lambert, 19 February 1749
- Lodovico Antonio Muratori to Cardinal Fortunato Tamburini, 19 February 1749
- Alessandro Chiappini to Lodovico Antonio Muratori, 20 February 1749
- Edward Young to Samuel Richardson, 20 February 1749
- Edward Young to Mary Delany [formerly Mrs Pendarves; née Granville], 20 February 1749