'The museum of the Otto-von-Bismack Foundation contains 13 photos with reference to the company Jantzen & Thormählen. The photos

'Exploratory Expedition to the North-East of the Togo Hinterland (1889 Staff Doctor Dr. Wolf). Report from Imperial Commissioner von Puttkamer to von Bismarck

'Bekämpfung von Unruhen und Aufständen. - 'Rogozinski and Janikowski Expedition: The Expulsion and Detention of the Polish Adventurer Stanislaus von Scholz-Rogozinski and Interdiction of the Study of the Protectorate by the Polish Adventurers Janikowski and Compagnions'

'Situation of White Populations. - Victoria

Combating unrest and insurrection. - Cameroon hinterland research expedition (Dr Eugen Zintgraff). - Business trip (Chancellor Count Pfeil, Marcus), Greater and Lesser Batanga, Kribi, Kampo, Spanish Muni, Gabon, St Thome (with detailed statement by the Governor of Soden), 1889 [fol. 1 - 54] Trade and commerce. - Establishment of factories of the company Knutson, Valdau & Heilborns Afrikanska Handelsaktiebolag on the Massake, Ndian and Rio del Rey under certain conditions. - Report of the Governor of Soden to the Foreign Office, 1899 [fol. 57 - 59]

African servants. - Recruitment of forest wardens. - Order of the governorate (copy), 16 August 1913 Acquisition of land. - Individual cases. - Yaoundé. - Dissolution of the Mbegge factory of Woermann & Co, Batanga business, 30 Dec. 1913