1936-1972 in Swakopmund, Gibeon, Warmbad; letters and reports, correspondence also with the Mayer family, circulars, from 1955; curriculum vitae, testimonies, recommendations, 1927-1931; diploma, 1935; curriculum vitae, certificates, recommendations for Johanna Wilhelm (bride), 1935; funeral address at d. Wedding on 29.04.1938, held by Inspector Johannes Georg Heinrich Olpp, 1938; Letter of the Chief Evangelist Joseph Hanse, Stamprietfontein, and Hendrik S. Isaak, Maltahöhe, to Father Gustav Menzel, 1951