1Franklin and Madame Helvétius: An Exchange through Cabanis, [August or September 1779?] (Franklin Papers)
(I) Reprinted from Curious and Facetious Letters of Benjamin Franklin Hitherto Unpublished...
2To Benjamin Franklin from Anne-Catherine de Ligniville Helvétius, [1782?] (Franklin Papers)
AL : American Philosophical Society Mon cher, ami je Comte vous avoire adiné mecredi, avec votre...