1To Benjamin Franklin from [Charles] Jackson, 4 November 1767 (Franklin Papers)
AL : American Philosophical Society Mr. Jackson presents his Compliments to Mr. Franklin, with...
2To Benjamin Franklin from Charles Jackson, 20 May 1771: résumé (Franklin Papers)
AL : University of Pennsylvania Library <General Post Office, May 20, 1771, a note in the third...
3To Benjamin Franklin from Charles Jackson, 4 August 1773 (Franklin Papers)
ALS : American Philosophical Society <Wednesday, August 4, 1773: An invitation, with apologies...