Commerce de l'hévéa. - Claim for payment of reparations by the French Ngoko-Sangha-Gesellschaft against the firms Hatton & Cookson, Ltd. and John Holt & Co, Ltd, Liverpool on account of the rubber tree trade originating in their concessionary zone on the not yet determined southern frontier of the Protectorate of Cameroon - Government Report, 1907nBorders with French possessions. - Status quo agreement between Germany and France of 11.8.1905 relating to the limits of the southern and eastern border of the Protectorate with the French Congo. - Expertise, 1907 Regional border issues. - Kousseri, 1904, 1909 General political, military and economic conditions and Makari (Sultanates), January 1909 Customs. - Ngaoundéré (Residenturen) Customs policy conditions, 1909 Borders of the Protectorate. - Questions des frontières régionales - Garoua, Novembre 1908 - Mars 1909nFrontières du Protectorat. - Questions of regional borders. - Golombe-Bipare, 1909 Questions des frontières régionales - Chari, 1898, 1906, 1909

Lange, Erich (1889 - 1965) Prof. Dr.phil.; Professor of Fuel Geology 1946 President of the German Geological Survey; Director of the Geological Service of the GDR The estate contains: Excerpts from the file 1957 "Preparation of the commemorative event 10 years StGK (Staatliche Geologische Kommission) (contains among other things: material, elaborations and handwritten notes) Correspondences Personal letter of Gottlieb A. Seberna Handwritten notes among other things from and to geological books, to Cameroon, manuscripts to geological observation in French, German and English. Colonies (e.g. East-Adamaua), excerpts from the journal of the German Geological Society vol. 84(1932), photographs of tree trunks in a basalt stream near Meiganga

'Mutation des Soldats Haoussa du Togo à Yaoundé afin d'y établir un contact avec les caravanes de marchands Haoussa de l'Adamaoua et leur redirection vers la côte du Protectorat du Cameroun. - Arrêté du Ministère des Affaires étrangères