1Penet, D’Acosta freres & Cie. to the American Commissioners, 3 September 1778: résumé (Franklin Papers)
ALS : American Philosophical Society <Nantes, September 3, 1778, in French: We are enclosing a letter for you brought from Boston by our ship Le Courier de l’Europe and renew our offer of services.> Penet’s new partners in Nantes. D’Acosta frères were a Nantes merchant firm which was engaged to a significant degree in transatlantic trade: Villiers, Commerce colonial , p. 405.