1From Benjamin Franklin to Cadwallader Colden, 4 November 1743 (Franklin Papers)
ALS : New-York Historical Society; also transcript: Library of Congress I received the Favour of...
2From Benjamin Franklin to Cadwallader Colden, 5 April 1744 (Franklin Papers)
ALS : New-York Historical Society; also transcript: Library of Congress Happening to be in this...
3From Benjamin Franklin to Cadwallader Colden, 13 September 1744 (Franklin Papers)
ALS : Yale University Library Dr. Mitchel, a Gentleman from Virginia, came to Town this Morning...
4From Benjamin Franklin to Cadwallader Colden, 25 October 1744 (Franklin Papers)
ALS : New-York Historical Society I communicated your Piece on Fluxions to Mr. Logan, and being...