1To Benjamin Franklin from Chaumont, [on or after 17 September 1780] (Franklin Papers)
AL : American Philosophical Society M. de Chaumont a L’honneur de Communiquer a Son ami M. le...
2To Benjamin Franklin from Dumas, 17 September 1780 (Franklin Papers)
ALS : American Philosophical Society; AL (draft): Algemeen Rijksarchief Je crois devoir profiter...