1To Benjamin Franklin from Gustavus Conyngham, 18 November 1779 (Franklin Papers)
ALS : American Philosophical Society I have the pleasure to enforme you that on the 3d. Instant...
2To Benjamin Franklin from Gustavus Conyngham, 1 December 1779 (Franklin Papers)
ALS : American Philosophical Society I wrote you last from Amsterdam at that time enformed of my...