1To Benjamin Franklin from Jacob Duché, Junior, 6 May 1757 (Franklin Papers)
ALS : American Philosophical Society As you kindly offered me your best Services before you left...
2To Benjamin Franklin from Jacob Duché, Jr., 28 January 1783 (Franklin Papers)
ALS : American Philosophical Society I take the earliest Opportunity, since the Signing of the...
3To Benjamin Franklin from Jacob Duché, Jr., 22 April 1783 (Franklin Papers)
ALS : American Philosophical Society I return your Excellency my most sincere and hearty Thanks...
4To Benjamin Franklin from Jacob Duché, Jr., 21 April 1784 (Franklin Papers)
ALS : American Philosophical Society I take the Liberty of addressing your Excellency on a...