1To Benjamin Franklin from Rodolphe Valltravers, 6 February 1767 (Franklin Papers)
AL : American Philosophical Society Mr. Valltravers’s best Respects wait on Dr. Franklin, and...
2To Benjamin Franklin from Rodolphe Valltravers, 20 March 1768 (Franklin Papers)
AL : American Philosophical Society Mr. Valltravers presents his best Respects to Dr. Franklin,...