1From Benjamin Franklin to Humphry Marshall, 13 March 1775 (Franklin Papers)
AL : Yale University Library I duly receiv’d your Favour of Novr. the 26th, but having mislaid...
2From Benjamin Franklin to Humphry Marshall, 26 June 1774 (Franklin Papers)
ALS : Gray Herbarium, Harvard University I received and am obliged by your Favour of May 14, in...
3From Benjamin Franklin to Humphry Marshall, 14 February 1773 (Franklin Papers)
ALS : Yale University Library; letterbook draft: Library of Congress A considerable Time after...
4From Benjamin Franklin to Humphry Marshall, 20 March 1772 (Franklin Papers)
ALS : Yale University Library I received your obliging Letter of Nov. 27. It was forwarded to me...
5From Benjamin Franklin to Humphry Marshall, 22 April 1771 (Franklin Papers)
ALS : Yale University Library I duly received your Favours of the 4th. of October and the 17th....
6From Benjamin Franklin to Humphry Marshall, 18 March 1770 (Franklin Papers)
ALS : Yale University Library I was duly favoured with yours of Oct. 30, and glad to hear that...
7From Benjamin Franklin to Humphry Marshall, 9 July 1769 (Franklin Papers)
ALS : Mr. S. Hallock du Pont (1955) I received your obliging Favour of April 13. with Specimens...