Contains: From Cameroon to Benuè (1891); Travels in the hinterland of Cameroon 1889/1891 (1891); Time sketches (1919); My troops hero fights (1920)

Contains among other things: Data from the travels of Prince Heinrich (1878-1898), o. Dat. From the diary of a Schleswig-Holstein volunteer, Sept. 1848 Memorial Days of the Imperial Navy, o. Dat. Magazine for the colonial monthly sheets (print), July 1913

A. Biographical B. WerkC. TravelD. Correspondence. Teaching activityF. CollectaneenG. Texts of other authorsH. prints