Enthält u.a.: Territory of South West Africa. Report on the census of the European population. Taken on the 4th May, 1926. Pretoria, 1927. Deutsche, Buren und Engländer in Südwestafrika. Sonderdruck aus "Koloniale Rundschau" Heft 9/10, 1931.
Letters, reports, invoices, 1901-1910; So-called "Burensache, i. e. the employment of two Boers from Transvaal, father and son of Folker, who could not return to their homeland, 1902-1903; "Baptism of the first fruits of Gombero, December 1906; Plan of the Mission House in Gombero (Digo), 1907; Call to Organize a German Protestant Church in Tanga u. in the hinterland, printed flyer, 1909; A copy of the "Usambara-Post with an essay by Delius about "Die deutsche evangelische Kirchengemeinde von Tanga u. Hinterland vom September 1909
Evangelical Missionary Society for German East Africa