1From Benjamin Franklin to Peter P. Burdett, 3 November 1773 (Franklin Papers)
Copy: American Philosophical Society I was much pleased with the Specimens you so kindly sent me,...
2From Benjamin Franklin to Peter P. Burdett, 21 August 1773 (Franklin Papers)
ALS : Yale University Library; mutilated draft: American Philosophical Society Burdett is one of...
3From Benjamin Franklin to [Peter P. Burdett], 17 March 1775 (Franklin Papers)
AL (draft): American Philosophical Society Being about to embark for America this Line is just to...
4To Benjamin Franklin from Peter P. Burdett, 15 December 1774 (Franklin Papers)
ALS : Historical Society of Pennsylvania My Passage thro London and departure from England was so...