1884-1929 in Warmbad, Windhoek, Keetmanshoop, Lüderitzbucht, Präses d. Nama-Mission; letters, reports, station reports, annual reports, statistics, 1884-1929; private letters to Inspector Ludwig von Rohden, 1885-1886; in 1.623a pages 19-21 are missing, probably 2 watercolours by Blyde Verwacht u. !Nabis im Gei!from Karl (Carl) Friedrich Wandres, ca. 1887; - Map overview of the sold places between Keetmanshoop and Warmbad, ca. 1888; Report of the elders Johannes Witbooi, Warmbad, about his evangelization journey in the area of the Bondelzwarts, 1889; Orders to Friedrich Kämpfer and Friedrich Schindelin, 1888-1889; Declaration of honour of the captains d. Bondelzwarts for Karl (Carl) Friedrich Wandres, 1891; Report about the sermon journey of two elders of the Warmbad community, 1893; Timetable of the Imperial German Reich Post Keetmanshoop - Steinkopf, 1894; map by !Nabis M. 1: 300 & projected mission station, 1896; private letters to Inspector Johannes Wilhelm Karl Spiecker, 1886-1898; Three visits to Rietfontein (Kalahari desert), essay, 1898; About the use of alcohol in our churches, 16 p. hs, 1898; Roman tissue of lies, 1900; Memorandum on land matters in Windhoek, 1903; Festivities for the inauguration of the Mission Church in Windhoek, May 1903; Native Census of Windhoek, March 1903; 1 copy of a booklet with the name of the church. "German Southwest African Newspaper", No. 2, January 1903; 1 copy "Landeszeitung für Westafrika", No. 112, September 1920; copy of a letter by Hendrik Witbooi, July 1889

see also RMG 1.593,[the typescript bears the note "Archiv Karibib, Rheinische Mission"]; In distant worlds: Letters from a German missionary woman in d. Homeland, covering the years 1863-1903 with interesting descriptions of life at the mission stations Berseba, Keetmannshoop, Windhoek, Warmbad, Komaggas, Southwest Africa, 120 p., ms., no year;

1913-1953 in Rietfontein, Keetmanshoop, Rehoboth; Letters, reports, correspondence with various personalities of the mission leadership, 1912-1966; curriculum vitae, testimonies, 1906 1912; From the History of the Missionary Station, (Rehoboth), 5 p. ms. Fragment, 1945; From people I met on the country road of my life until my 75th birthday, 80 p. ms. (p. 51-64 missing), 1958; Correspondence Siegfried Groth with Wilhelm and Bertha Lind, née Winkel, 1962-1967; obituary for Wilhelm Lind, 1966;