1From Benjamin Franklin to Dumas: Two Letters, 29 March 1780 (Franklin Papers)
(I) and (II) Copy: Library of Congress; transcript: National Archives I did receive the Letter...
2From Benjamin Franklin to [Dumas], 31 March 1780 (Franklin Papers)
ALS : Boston Public Library; transcript: National Archives I wrote to you yesterday relating to...
3From Benjamin Franklin to Dumas, 23 April 1780 (Franklin Papers)
Copy: Library of Congress; transcript: National Archives I am Much pleased with the Account you...
4From Benjamin Franklin to Dumas, 5 June 1780 (Franklin Papers)
LS : American Philosophical Society; copy: Library of Congress; transcript: National Archives The...
5From Benjamin Franklin to Dumas: Two Letters, 22 June 1780 (Franklin Papers)
(I) and (II) copies: Library of Congress, National Archives I received duly yours of May 23. June...