1870-1872 teacher at the Seminar d. RMG, 1873-1880 in Otjimbingue, 1880-1887 pastor in Königsberg, 1887-1889 inspector of the East Africa Mission and lecturer at the Oriental Seminar Berlin III; Letters and Reports, 1872-1880; Protocoll about the abolition of the forging of the Mission Colony Otjimbingue, 1874; Regen im Damralande, 7 p., hs., 1875; Löwengeschichten, 10 p. hs..., 1875; Sociale Verhältnisse im Hereroland, 36 p., hs., 1876; Die Bergdamra, 16 p., 1877; Wege im Damaraland, 16 p., 1877; 2 letters of J. Chr. Goliath from d. Augustineum, 1877; The Augustineum in Otjimbingue, 5 p.., hs., 1877; school visit in Hererolande, 20 p., hs., 1879; church consecration in Scheppmannsdorf, 10 p., 1879; September 1990 preserved: Personal Diarium of Büttner from the years 1867-1871; biographical material on Büttner (copies) by Prof. Ernst Hans Dammann;[Büttner's letters contain interesting information on the Mission Trade Society and on political conditions in Southwest Africa, see also Bethel Mission];

Contains: Memorandum on the violation of the interests of the Deutsche Kolonialgesellschaft für Südwestafrika by the Damaraland Concession

Contains among other things: Papers, Minutes

Contains among other things: Rothe and Hagen, About the economic situation of Damaraland (German Southwest) and Angola. Berlin, 23 Nov 1911 Meetings in Windhoek in the presence of State Secretary Dr Solf. Records of 18 July 1912

Contains among other things: Bernhard Schrey, The Truth About the Damaraland Affair, 1889

Contains among other things: The Germans in Damaraland. Cape Town, 1889.