Traveled extensively throughout Europe. Director of the Berlin publishing firm Haude and Spener (1772). Also edited the firm’s newspaper, Berlinsche Nachrichten von Staats- und gelehrten Sachen, and wrote scientific articles for it. Edited and translated numerous historical and scientific works. Published Allgemeines historisches Taschenbuch . . . (Berlin, 1783), which included a lengthy essay on the American Revolution by Matthias Christian Sprengel.
Also called “Johann Karl Philipp Spener.” Married Sophie Decker (1781).
First letter in correspondence: May 26, 1783; ADB.