1To Benjamin Franklin from Joseph Mayo, 30 September 1781 (Franklin Papers)
ALS : American Philosophical Society Thinking it may not be amiss to mention all the...
2To Benjamin Franklin from Joseph Mayo, 25 October 1781 (Franklin Papers)
ALS : American Philosophical Society I request the favor of your Excellency to let me know what...
3To Benjamin Franklin from Joseph Mayo, 23 December 1783 (Franklin Papers)
AL : American Philosophical Society Mr. Mayo presents his most respectful Compliments to Dr....