1901-1930 in Ondjiva, Omupanda, Namakunde, Lüderitzbucht, s.a. RMG 1.477 manuscript about Ovamboland; letters and reports, 1901-1950; curriculum vitae (3 versions), applications, medical certificate, 1891-1901; letter from Wilhelm Heumbo, Ondjiva, with d. Request for more teachers for Ovamboland, 1908; annual report of the Ovambo community Lüderitzbucht-Diamantfelder, 1919; death announcement for Karl Sckär, 1950; correspondence with the Sckär family, 1958-1964; death certificate for Wilhelmine Sckär, née Kremer, 1968

from 1906 unoccupied, farm s. RMG 2.559; Conference and Station Reports, by Ferdinand Lang, 1898-1903; Reports of local teachers and evangelists: Manasse Pujatura, Willibald Kerijaa, Urbanus Kerija, Julius Kauraisa and Ephraim Kaatutuka, 1901; Visitation Report, 1906; Reports by Wilhelm Emil Jakob Diehl about the Herero collection point Otjihaenena and its transfer to Okomitombe near Gobabis, 1906;

1895-1937 in Otjimbingue, Karibib, Praeses and Inspector from 1910; Letters and reports (Presidential files separate), 1895-1910; application for missionary service, curriculum vitae, expert opinion Johannes Georg Heinrich Olpp, 1894; private letters to Inspectors d. RMG, 1895-1899; Instruction for Johannes Georg Heinrich Olpp, 1895; Report on Franz Heinrich Kleinschmidts Death in Otjimbingue, 1896; Overview of the Mountain Damra Church in Otjimbingue, 1896; What drives for faithful work in the mission can the biblical teaching of Christ's Second Coming grant us? Lecture, 12 p., hs., 1898; Lieutenant Kuhn to inspector because of missionary for Karibib, 1901; property case Redecker with sketch, 1904; holiday application Johannes Georg Heinrich Olpp, 1907; plan about Biblical history education to be mastered in the schools, Otjimbingue, 1908; private correspondence from and. with Johannes Georg Heinrich Olpp (partly from the estate), 1928-1948; correspondence with Maria Olpp, née Johannsen (also curriculum vitae and death certificate), 1948-1961; Olpp translated the book "Eine Reise durch Afrika", by J. Du Plessis, 1916, from the Netherlands into German, under the signature 1-02812 in the holdings of the Archive Library ;

Teacher, Head of the Augustineum, 1907-1920 Okahandja, Windhoek, from 1922 preacher in USA ; letters and reports, 1907-1920; curriculum vitae (2 versions), references, cover letter, 1899-1918; Organisation d. Windhoek Mission Schools, 1913; Statistics and Timetable, 1918; Curriculum Vitae and Testimonies of Margarethe Nowack, née Werth, 1907; Correspondence with the German Colonial Society about reimbursement of travel home fees for Kurt Nowack, 1923;

Station, annual and travel reports; joint letters, among others by Carl Hugo Hahn, Johannes Rath, Franz Heinrich Kleinschmidt and others; reply by the deputation; report on peace negotiations on Schmelens Verwachting (Okahandja), 1870; detailed information on the peace negotiations in the region. Explanatory notes on the Mission Trade Society, 1871; Communication by Carl Hugo Hahn on his resignation from the RMG, 1872; Decisions on the Church Constitution and on the German Constitution for the Church Forms, 1873; Carl Hugo Hahn's statements on this and linguistic changes 1874 1875; Reports, by Daniel Cloete from 1873; Statistics, Status: May 1876; Über d. Gottes- u. Opferbegriff d. Herero, Referat, C. Heinrich Beiderbecke, 43 p., hs., 1877; Schulordnung für d. Schulen im Bereich d. sog. Herero-Konferenz, 1877; Instruction for teachers trained in the Augustinum, 1877

Diary & Letters d. teacher Jonas Rynhards, Rehoboth, who was trained in Barmen, 1850-1852; Letters &. Reports by Daniel Cloete, Traugott Kauapirura, Elias Kandirikirira, Paul Mbenovandu, Manasse Kaukutua, Theobald, Gottlieb oa Jonas, Gabriel Hendrik Huaaraka, Jonas Lukas, Josaphat Kamatoto, Petrus Hendrik, Gottlieb Davids, Willy Zeraua and others local Christians, evangelists, preachers and teachers, 1889-1911

Teacher 1898-1901, 1901-1904 Priest in Dhünn, 1905-1934 Superintendent in Essen, 1934-1946 Africa-Dezernent; testimony about teaching in the missionary seminar, 1901; private correspondence, 1917-1948; letter by J. Olpp from Swakopmund, 1935; correspondence with Dr. Albert Schweitzer, 1928-1933; What the church owes and owes to the Outer Mission, o.J.; death announcement "29.10.1950; Akten der Waldthausen-Stiftung, Essen, 1927-1930; Akten der Druckerei Gemeinwohl, Essen, 1935; Construction drawings of the houses Uhlandstr. 4 and Dreilindenstr. 71, Essen, 1908;[Questions of the local mission organization, lecture, 1929 see RMG 625].

Teacher (teaching nurse) in Grootfontein; Correspondence (only a few documents), 1927-1961; Pfarramtliches Zeugnis, 1929; booking note, 1933;