1From Benjamin Franklin to Thomas Percival, [June? 1771] (Franklin Papers)
Extract printed in Memoirs of the Literary and Philosophical Society of Manchester , II (1785),...
2From Benjamin Franklin to Thomas Percival, 15 October 1773 (Franklin Papers)
ALS (draft): American Philosophical Society; copy: National Library of Scotland I have received...
3From Benjamin Franklin to Thomas Percival, 17 July 1784 (Franklin Papers)
Transcripts (two) and incomplete copy: Library of Congress; copy: Lancashire Record Office I...