Length: approx. 20 letters. Letter author: Casimir Count of Castell-Rüdenhausen (1861-1933). Recipient: Prince and Princess Wolfgang and Emma zu Castell-Rüdenhausen. Places: Darmstadt, Senne military training area, On board the Andalusia, Tsingtau, Taku, Gai-Hi-Guang near Tientsin, Tientsin, Fei-Kia-tsuang, Shangai, Bremerhaven.

Conferences to Borneo, Sumatra, Nias, China, New Guinea, Herero, Nama and Capland; additionally some official letters after Rohden's death (1889);

Letters to Cap colony, Nama and Hereroland, New Guinea and China

Letters of a German top paymaster from Tsingtao in the German protectorate Kiautschu** Size: 160 letters, 300 postcards Processing: completely transcribed; not digitized Planning: feeding into the Kaliope-Verbund (2018)