Letter listing for 1730–1739
- Jonathan Swift to Edward Harley, 2nd earl of Oxford, 14 April 1738
- 5 Roman silver medals from Jonathan Swift for Edward Harley, 2nd earl of Oxford, 14 April 1738
- Filippo Argelati to Lodovico Antonio Muratori, 18 April 1738
- Frederick II, king of Prussia [the Great] to Voltaire [François Marie Arouet], 19 April 1738
- Erasmus Lewis to Jonathan Swift, 19 April 1738
- Annibale degli Abbati Olivieri-Giordani to Lodovico Antonio Muratori, 21 April 1738
- Francesco Brembati, conte Brembati to Lodovico Antonio Muratori, 23 April 1738
- Simon Henri Dubuisson to Joseph de Seytres, marquis de Caumont, 23 April 1738
- Voltaire [François Marie Arouet] to Nicolas Claude Thieriot, 23 April 1738
- Alexander Macaulay to Jonathan Swift, 24 April 1738
- Voltaire [François Marie Arouet] to Frederick II, king of Prussia [the Great], c. 25 April 1738
- Voltaire [François Marie Arouet] to père Bonaventure Moussinot, abbé Moussinot, 29 April 1738
- Gabrielle Émilie de Châtelet-Lomont d’Haraucourt, marquise Du Châtelet-Lomont [née Le Tonnelier de Breteuil] to Pierre Louis Moreau de Maupertuis, 30 April 1738
- Lodovico Antonio Muratori to Annibale degli Abbati Olivieri-Giordani, 30 April 1738
- Gabrielle Émilie de Châtelet-Lomont d’Haraucourt, marquise Du Châtelet-Lomont [née Le Tonnelier de Breteuil] to Charles Augustin Feriol, comte d’Argental, 1 May 1738