Correspondence; sources from Belgian government archives on the situation of German missions in Rwanda (copies), 1913-1929; attempts by foreign missions to provide assistance in Rwanda, 1933; correspondence with "Les Amis des Missions in Brüssel, 1966-1969

A missionary study on "Leadership and Experience by Ernst Johanssen, conceived by his son-in-law Pastor Gerhard Jasper Sr., about 1940; documents on "Leadership and Experience by Dr. Ernst Johanssen, published after his death by his son-in-law Pastor Gerhard Jasper Sr., including source texts, remarks and correspondence on "Leadership and Experience, Sources on the Relationship of the Bethel Mission and Church Mission Society, Rwanda and the final section