Letter listing for 1770–1779
- René Louis de Girardin, marquis de Girardin to Paul Claude Moultou, 27 April 1779
- Corilla Olimpica [Maria Maddelena Morelli Fernandez] to Giovanni Cristofano Amaduzzi, 27 April 1779
- René Louis de Girardin, marquis de Girardin to Pierre Antoine Benoît, 29 April 1779
- Ignatius Sancho to Roger Rush, May 1779
- René Louis de Girardin, marquis de Girardin to Charles Nicolas Cochin, May 1779
- Jacques Henri Bernardin de Saint-Pierre to [unknown], c. May 1779
- Jacques Henri Bernardin de Saint-Pierre to Don José de Solano y Bote Carrasco y Díaz, marqués del Socorro, c. May 1779 [inferred existence]
- William Cowper to Reverend William Unwin, 1 May 1779
- Société typographique de Genève to Société typographique de Neuchâtel, 1 May 1779
- René Louis de Girardin, marquis de Girardin to Pierre Antoine Benoît, 1 May 1779
- Jacques Henri Bernardin de Saint-Pierre to Pierre Michel Hennin, 1 May 1779
- Collection des Estampes: premier prospectus by Société typographique de Genève, 1 May 1779
- Giovanni Cristofano Amaduzzi to Corilla Olimpica [Maria Maddelena Morelli Fernandez], 2 May 1779
- James Boswell to William Johnston Temple, 3 May 1779
- Marie Anne de Vichy-Chamrond, marquise Du Deffand [née de Vichy] to Horace Walpole, 4th earl of Orford, 3 May 1779
