Letter listing for 1740–1749
- Horace Walpole, 4th earl of Orford and Thomas Gray to Richard West [junior], 16 April 1740
- Françoise Paule Huguet de Graffigny [née d’Issembourg Du Buisson d’Happoncourt] to François Antoine Devaux, c. 17 April 1740
- Françoise Paule Huguet de Graffigny [née d’Issembourg Du Buisson d’Happoncourt] to François Antoine Devaux, c. 19 April 1740
- Voltaire [François Marie Arouet] to Jeanne Françoise Quinault, 19 April 1740
- Filippo Argelati to Lodovico Antonio Muratori, 20 April 1740
- Françoise Paule Huguet de Graffigny [née d’Issembourg Du Buisson d’Happoncourt] to François Antoine Devaux, c. 21 April 1740
- Alessandro Chiappini to Lodovico Antonio Muratori, 21 April 1740
- Lodovico Antonio Muratori to Nicola Tacoli, 21 April 1740
- Gabrielle Émilie de Châtelet-Lomont d’Haraucourt, marquise Du Châtelet-Lomont [née Le Tonnelier de Breteuil] to Frederick II, king of Prussia [the Great], 25 April 1740
- Jean Jacques Rousseau to Françoise Louise Eléonore de La Tour, baronne de Warens, 25 April 1740
- Voltaire [François Marie Arouet] to père Pierre Robert Le Cornier de Cideville, abbé Cideville, 25 April 1740
- Frederick II, king of Prussia [the Great] to Voltaire [François Marie Arouet], 26 April 1740
- Gabrielle Émilie de Châtelet-Lomont d’Haraucourt, marquise Du Châtelet-Lomont [née Le Tonnelier de Breteuil] to Johann Bernoulli, 27 April 1740
- Alexander Pope to Reverend Doctor William Warburton, bishop of Gloucester, 27 April 1740
- Alexander Pope to Samuel Gerrard, 29 April 1740