Deputation to Christian congregation in Warmbad (concept in Dutch), 1891; sketch of the location of Warmbad with attack and retreat routes of troops in the war, signed by Karl Friedrich Wandres, 1903; ground plan of the mission house, list of inventories, 1913; annual and conference reports, by Hermann Nyhof u. August Karl-Friedrich Rethemeier, 1908-1945; Visitationsberichte, 1909 1912; Grundstücksangelegenheiten, Eigentumsverhältnisse, 1911; Kaufvertrag von Warmbad, 1912; Bau e. Kapelle in Haib, cost estimate, correspondence, 1912-1913; Antrag auf Windmotor u. Wasserleitung, 1913; cost estimate for new construction of the mission house, 1914

Contains among other things: Plan of the water pipeline in Windhoek General maps of the settlement Windhoek from 22 August 1909 (M.: 1:4000) and of Klein-Windhuk from 13 May 1911 (M.: 1:4000)