Engineer, 1898-1900 in Otjimbingue, later professor in Poznan/West Prussia; correspondence, expert opinions, reports on the improvement of water supply and farm management, 1898-1900; instruction for Walter Borchardt, 1898; Friedrich Wilhelm Gottlieb Viehe on Walter Borchardt's plans for a new water supply system, 1898-1900. d. Bewirtschaftung von Gaub, 1900; Plan sketch of Otjimbingue, 1:100,000 (damaged), 1899; Map sketch of Gaub, 1899; Profil e. Test drilling for e. cattle drinkers in Otjozonjupa, 1899; Letter of the daughter with death announcement, 1938;
Société des missions du RhinMissionary Sister, 2nd wife of Missionary Gottlieb Viehe, 1902-1911 music teacher and catechist in Okahandja, Otjikango and De Doorns, see also RMG 1.603-1.604; correspondence, among others about her experiences during the Herero Uprising (1904), 1902-1913 1925-1931; death announcement and data from her life, 1934;
Société des missions du RhinNotes on Friedrich Wilhelm Gottlieb Viehe's Otjiherero grammar and dictionary from 1897;
Société des missions du Rhin1868-1920 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
Société des missions du Rhin1891-1900 in Okombahe; Letters, station and annual reports, statistics, 1890-1901; Report on Okombahe by Daniel Cloete, 1891; copy e. letter by Chief Manasse Tjeseta, 1894; contract (copy) of the German government with Captain Cornelius, 1894; letter of the voluntary evangelist Julius Kaitjenonjungu, 1897; sketch of the map. Station Okombahe, 1898; Correspondence Wilhelm Schaar with Friedrich Wilhelm Gottlieb Viehe, 1900; Correspondence with Mrs. Martha Schaar, née Sapel, report on the death of Wilhelm Schaar, 1901; private letters to Inspector Johannes Wilhelm Karl Spiecker, 1890-1898; obituary for Mrs. Martha Schaar, 1942; correspondence with the Schaar family, 1919-1956;
Société des missions du Rhin