1To Benjamin Franklin from Peter Hasenclever, 9 February 1767 (Franklin Papers)
AL : American Philosophical Society Mr. Hasenclever presents his Respects to Dr. Francklin, sends him his Carriage and hopes to have the Honnour to see him to day at Dinner, or as Soon as possible. Addressed: To/Dr. Benjamin Francklin Esq/Cravenstreet/Westminster Peter Hasenclever (1716–1793), Prussian-born son of an iron manufacturer, came to New York in 1764 at the head of a British company...
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 Philadelphia and to Send you a Letter from Baron Waitz von Essen, who then was Minister of State here, who told me that he had been acquianted with you at Cassel, this Experienced and worthy Gentleman died Since, and I am in doubt if ever my Letter came to your hands. I take now the Liberty to Send you...