1To Benjamin Franklin from William Heberden, [before 20 March 1761] (Franklin Papers)
AL : Historical Society of Pennsylvania Dr. Heberden sends his compliments to Dr. Franklin and...
2To Benjamin Franklin from William Heberden, 17 January 1761 (Franklin Papers)
AL : Historical Society of Pennsylvania Dr. Heberden sends his Compliments to Dr. and Mr....
3To Benjamin Franklin from William Heberden, [4–9 December 1765] (Franklin Papers)
AL : Historical Society of Pennsylvania Dr. Heberden sends his compliments to Dr. Franklin, and...
4To Benjamin Franklin from William Heberden, 1 January 1767 (Franklin Papers)
AL : American Philosophical Society Dr. Heberden sends his compliments to Dr. Franklin, and...
5To Benjamin Franklin from William Heberden, 22 April 1767 (Franklin Papers)
AL : American Philosophical Society Dr. Heberden sends his compliments to Mr. Franklin, and...
6To Benjamin Franklin from William Heberden, before 10 June [1774?]: résumé (Franklin Papers)
Printed form with MS insertions: University of Pennsylvania Library <Before June 10, [1774? ]:...