1900-1919 in Rehoboth, Otjimbingue, later parish office Germany, the 2nd woman, Emma Blecher, née Böhle was missionary sister, no own file available; letters and reports, 1900-1919; curriculum vitae, application, medical certificate, 1894; "funeral speech at the grave of my expensive wife", Mathilde Blecher, née. Siebel, 1906; Donation of Platzes Ouises by Lazarus Cloete, copy of the document, 1907; lease contract for mission plot with farmer Herforth, Hoachanas, 1908; report on d. Death of his 2nd wife Emma Blecher, née Böhle, 1911; Correspondence on pay matters, 1929; Samuel Beukus, Rehoboth, complains to Adolf Blecher about d. Successor of Adolf Blecher in Rehoboth, Missionary Hermann Schroer, 1930; obituary for Adolf Blecher, 1938; correspondence with Martha Blecher, née Stegemann, 1938-1951; obituary for Martha Blecher, 1951;

Missionary construction technician, 1901-1908 in Windhoek, Karibib, Okahandja, Otjimbingue, Rehoboth; letters and work reports, 1901-1909; curriculum vitae, certificates, 1899-1901; instruction for Johann Jacob Diehl, 1901; construction report of the Windhoek Mission Church, 1902; report on the visit to the station building in Otjizewa, 1903; proposals for e. Building regulations for the Herero Conference, 1906;

1850-1853 in Capeland, 1853-1868 in Berseba, Rehoboth, Nansannabis, Gobabis, Scheppmannsdorf, from 1869 parish office in North America; letters and diaries from missionary journeys in the holidays, 1849; letters and diary reports from various stations in South and South West Africa, 1850-1869;

Missionary doctor, 1913-1914 Rehoboth; Correspondence on financial matters, 1913-1914; Missionary Adolf Blecher on Dr. Otto Gleiss, 1914;

Oasib's tribe, gen. Roode Natie or Red Nation, unoccupied after 1922, outstation: Habamas, Station Hoachanas s. a. RMG 2.500 a, co-served by Gibeon since 1922, s.a. RMG 2.526 a, outstation of Rehoboth, Farm Hoachanas s. RMG 2.549; chronology of Station Hoachanas, 1853-1923; Station- u. Annual reports, by Friedrich Anton Judt, Wilhelm Niemeier and Adolf Blecher, 1903-1908; station and annual reports, by Emil Karl Laaf 1921,; visitation report, 1906; report on construction work, by mission colonist Oskar Emil August Gerlach, 1910; statistical questionnaire, 1910

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;

Reply of the Deputation; circular letter as "Shepherd's Letter" of the Conference to their parishes, 1926; Conference of the Rhenish Missionary Sisters, Protocol, 1927; Church Elders of Rehoboth to the Conference Members, 1927; "Mother Barmen to her children" in Herero and Namaland, Letter for the 100th birthday of the RMG, 1928

Transfer of records of missionary Friedrich Johann Christian Heidmann 1866-1902 and 1 letter from missionary Franz Heinrich Kleinschmidt, 1851, 453 p., ms., hardback;