Governor Adolf Graf von Götzen (5th from left) bids farewell to white and colored soldiers of the 5th Company of the German Protection Force in order to take a longer vacation in Germany. Count von Götzen was governor of German East Africa from 1901 to 1906 / Photographer: Scherl

Coloured soldiers of the German Schutztruppe, so-called Askari, at a parade in the station yard in Tanga in front of Governor Hermann von Wissmann. Hermann von Wissmann was governor of D e u t s c h - O s t a f r i k a in the years 1895-96 / Photographer: Scherl

Coloured soldiers of the German Schutztruppe, so-called Askari, at a parade in Dar es Salaam on the occasion of the 25th anniversary of the Schutztruppe in D e u t s c h - O s t a f r i k a / Photographer: Scherl

Coloured soldiers of a company of the German Schutztruppe, so-called Askari, marching out in the first days of the First World War / Photographer: Scherl

Group of local soldiers on the march. The Askaris supported the German Schutztruppe under General Lettow-Vorbeck until the end of the war in 1918. / Photographer: Scherl

Askaris (soldiers from Tanzania) of the Schutztruppe für Deutsch-Ostafrika (Tanzania) during the exercise with the heliograph / Photographer: Scherl

The command of the Schutztruppe in Dar es Salaam, from left to right: Paymaster Fritsch, Captain Baron Kurt von Schleinitz, Lieutenant General Wendland, Governor Major Count Adolf von Götzen, Lieutenant General Abel, Captain Johannes and Sergeant Triebel. Count Adolf von Götzen was governor of German East Africa from 1901 to 1906 / Photographer: Scherl

Five Chinese are executed by the German Schutztruppe in Litzun in the German colony of Tsingtau. Undated recording. / Photographer: Scherl

Contains among other things: "The Implications of China with the Western Powers 1856-1860" (manuscript) Report on events in China since 16 July 1900