1To Benjamin Franklin from Clemens August Haxthausen, 26 February 1783 (Franklin Papers)
ALS : American Philosophical Society Permettez votre Eccellence qu’un inconnu etrencher...
2To Benjamin Franklin from Ingenhousz, 26 February 1783 (Franklin Papers)
ALS : American Philosophical Society You will have recieved my last, by which I asked you leave...