Letter listing for 1740–1749
- Françoise Paule Huguet de Graffigny [née d’Issembourg Du Buisson d’Happoncourt] to François Antoine Devaux, 3 April 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, 3 April 1749
- Gabrielle Émilie de Châtelet-Lomont d’Haraucourt, marquise Du Châtelet-Lomont [née Le Tonnelier de Breteuil] to Marie Françoise Catherine de Boufflers, marquise de Boufflers-Remiencourt [née de Beauvau-Craon], 3 April 1749
- Pietro Ercole Gherardi to Lodovico Antonio Muratori, 3 April 1749
- Cardinal Fortunato Tamburini to Lodovico Antonio Muratori, 3 April 1749
- Frederick II, king of Prussia [the Great] to Voltaire [François Marie Arouet], 5 April 1749
- Pietro Ercole Gherardi to Lodovico Antonio Muratori, 5 April 1749
- Edward Young to Sir William Bunbury, 5th baronet, 5 April 1749
- Françoise Paule Huguet de Graffigny [née d’Issembourg Du Buisson d’Happoncourt] to François Antoine Devaux, 6 April 1749
- Françoise Paule Huguet de Graffigny [née d’Issembourg Du Buisson d’Happoncourt] to François Antoine Devaux, 7 April 1749
- Alessandro Chiappini to Lodovico Antonio Muratori, 7 April 1749
- Receipt for the copyright to Griffiths's Jack the Gyant Queller (1749) by Robert Dodsley, William Bowyer [the younger] and Ralph Griffiths, 8 April 1749
- Agreement for copies and plates of Cheselden's Anatomy of the human body (1713) by Charles Hitch, Robert Dodsley and James Dodsley, 8 April 1749
- Voltaire [François Marie Arouet] to Johann Bernoulli II, 9 April 1749
- Françoise Paule Huguet de Graffigny [née d’Issembourg Du Buisson d’Happoncourt] to François Antoine Devaux, 10 April 1749
