1868-1920 in Okahandja, Usakos; Reports & Letters, 1868-1918; Notes about the first baptism on Okahandja, Jan. 1873; Short history of: Jonker Afrikaner, as he met Damras, March 1873; station reports by Okahandja, 1888-1893; letters to and from missionary Peter Heinrich Brincker, 1888 1890; copy of correspondence with commissioner Nels u. Maharero Tjamuaha, 1890; Report of the Evangelist Elia Kandirikirira, 1891; Presentation: "Is it appropriate that Christians won by evangelists gather in parishes or return to their relatives", 6 pages, hs., 1891; Friedrich Wilhelm Gottlieb Viehe: Opinion on Herero land sales, 1887; Report on the increase in Herero's impoverishment through robbery, request for ideas from the German government, 1902; Reports on the Herero Uprising, 1904; Contract on the sale of land in Windhoek to the German tax authorities, 1904; Loss of property of the Mission and others, 1904; Contract for the purchase of the so-called "Borchard House" in Otjimbingue to Philipp Diehl, 1908; deed of donation of 5,000 marks from Philipp Diehl to Mission, 1912; congratulatory letter and laudatory speech for Philipp Diehl on his 50th ordination anniversary, 1918

Various excerpts from Carl Hugo Hahn's diaries and letters, thematically summarized typoscripts, probably by Dr. Heinrich Vedder in the 1920s:; Chronological Notes, 1841-1867; Kleine Notizen u. Briefaauszüge, 1844-1855; Carl Hugo Hahn u. d. Wesleyaner, 1844-1855; Missions-Kolonisation, 1863; Buren Immigration u. Augustineum, 1869; Die Friedenskonferenz zu Schmelens-Expartung (Okahandja), 1870; Wie Jonker Afrikaner mit d. Damaras geme gekommen, 1873; Heimreise, 1873; Correspondence with descendants of Carl Hugo Hahn, 1904-1943; copy of the doctoral diploma of the University of Leipzig for Carl Hugo Hahn (1874), 1954;