1To Benjamin Franklin from Peter Hasenclever, 9 February 1767 (Franklin Papers)
AL : American Philosophical Society Mr. Hasenclever presents his Respects to Dr. Francklin, sends...
2To Benjamin Franklin from Peter Hasenclever, 24 April 1779 (Franklin Papers)
ALS : American Philosophical Society In December 1775 I had the Honour to write to you for...