1From Benjamin Franklin to Charles-Guillaume-Frédéric Dumas, 25 July 1768 (Franklin Papers)
ALS : Massachusetts Historical Society I received your Favour of the 20th of April with the very...
2To Benjamin Franklin from Charles-Guillaume-Frédéric Dumas, 22 March 1771 (Franklin Papers)
ALS (incomplete): American Philosophical Society [ Beginning lost: ] Monsieur, que vous resterez...
3To Benjamin Franklin from Charles-Guillaume-Frédéric Dumas, [after 28 January 1774?] (Franklin Papers)
AL (incomplete): American Philosophical Society Le porteur de la présente est mon ancien et bon...