  When access to Leibniz’s papers stored in Hanover became possible in the 1830s, interest in Leibniz arose almost immediately. It can be said that German research on Leibniz started as an aftermath of this event (Glockner 1932, 60). The pioneers in this period of research were the first editors of these papers. Although the philological interest stood at the center, one could also observe an emerging interest in systematic aspects of Leibniz’s logic. The following editorial milestones have to be mentioned: Gottschalk Eduard Guhrauer (1809–1854) edited the Deutsche Schriften (Leibniz 1838/40); Georg Heinrich Pertz (1795–1876) directed the edition of the collected works, of which a first series was devoted to the mathematical writings (Leibniz 1849–1863). The latter were edited by Carl Immanuel Gerhardt (1816–1899). In addition, Pertz also edited Leibniz’s Annales imperii occidentis Brunsvicenses (Leibniz 1843–1846).