Correspondence on school issues, health care, reconstruction of Lwandai, printing works in Wuga etc., 1925-1927; monthly accounts, 1926; budget estimates, 1927-1928; conference protocol Mlalo, January 1927; oldest meeting of January 1927; status report on mission work(s) in Usambara by E. Johanssen, 1925; reports on the Bethel mission in "Dresdner Anzeiger, October 1927

Curriculum Vitae and copies of testimonies, 1930; Instructions and vows, 1930; Correspondence, 1930-1972; "Vom Schulwesen der Bethel-Mission in Usambara, 1931; "Erlebtes u. Beobachtetes (as a teacher in Lwandai), 1931; Circulars to the parents and friends, 1931. Friends of the school, 1931-1937; "The inauguration of the Friedrich von Bodelschwingh School in Mlalo-Lwandai, 1931; invitation to the inauguration of the new elementary school in Mlalo-Lwandai, 1932; applications for school support to English and German schools. German government offices, 1935; Invitation to the German School Festival in Lushoto, 1935; Disputes between Buchholz and Rorarius, 1935-1936; From the life of the Friedrich von Bodelschwingh School in Lwandai, 1936; Laudatio for Erhard Buchholz on his 80th birthday (a newspaper clipping), 1971