Private letters, 1890-1893; travelogues, diary notes, correspondence with Trittelvitz, 1905-1914; manuscripts, fragments, diaries, etc.: "The first visit of German children to Queen Msinga of Rwanda, "Back to Queen Msinga, "Observations on the Characteristics of Natives, 1907-1908; General Correspondence and Monthly Reports, 1927-1929; Bugufi calls us - Bugufi needs us, 1929; Letter of Native Christians from Bukoba to the Bishop of Central Tanzania, 1929; Impressions and thoughts during a journey into the landscapes of Mischenye u. Karagwe, 1929; Questionnaires with personal data and birth dates of 14 children, 1930; "Church Mission Society u. Bethel-Bielefeld Mission in Bukoba, German and English version by E. Johanssen, 1930; Correspondence with E. Johanssen, 1930-1933; death notice and memorial certificate, 1934; correspondence with Martha Johanssen, 1934-1940; "On the 100th birthday of E. Johanssen, 1964; "On the 100th birthday of E. Johanssen, by J. Busse, with the addition of Albrecht sen.., 1971

1866-1901 in Otjimbingue, Omaruru (Okozondke), Okahandja (Augustineum), Clara Viehe, née Rothe was a missionary sister; letters and reports, from 1890 half-yearly, cash and annual reports of the Augustineum; contributions to the "Little Missionary Friend"; copies of correspondence with representatives of the. German colonial government; copies of correspondence with Catholic missionaries, 1879; copy e. Treaty with Samuel Maharero on grazing rights and property of the RMG, 1894; manuscripts:; Customs of the Ovaherero after the birth e. Child, 1879; The Mountain Damra in Hereroland as object of the RMG. Mission, 1883; The indigenous Christians, after their spiritual life and moral behaviour, 1884; Die Herero, 1886; Gemeinde-, Kirchen- u. Synodalordnung für d. Evangelische Missionskirche im Hereroland, 1887; Die Missionstätigkeit Pauli und ihre Anwendung im Gebiete unserer Hereromission, 1891; Reiseberichte:; Bericht über e. Journey to Kaoko, with individual reports about Omaruru, Franzfontein, Okombahe, Otjombuina, 1893; report about e. Journey to Otavi, 1894; letters of Clara Viehe, née Rothe about her husband's death, 1901; The latest fights of Hendrik Witbooi against Herero, 1891

especially on the situation in East Africa