Correspondence with members of the Kolonialverein and the Kolonialgesellschaft on colonial issues and matters of the society (board elections etc.) with Richard Jakob, Berlin; Graf Stolberg-Wernigerode; Otto von Tettenborn, Colonel (retired), Dresden; Paul Zilling, Stuttgart; Prof. H. Wagner, Göttingen; Prof. Ratzel, Munich; Richard Lesser, Berlin (Deutsche Kolonialzeitung); Livonius, former vice admiral; Graf Hatzfeld-Trachenberg; Dr. M. Lindemann, Bremen; Count Behr-Bandelin; Admiral von Werner; Eighth Deutscher Geographentag-Freiherr von Richthofen; Prince zu Wied-Neuwied; Prof. W. Detmer, Jena; G. Schweinfurth; R. v. Bennigsen, Hannover and others.
Further grounds for appeal in Peters' private action against the editor Gustav Brüggemann (Kölnische Zeitung) and the former governor Rudolf von Bennigsen for insulting him on 15.06.1908
Judgment in the Peters appeal against the editor Gustav Brüggemann (Kölnische Zeitung) and the former governor Rudolf von Bennigsen for insulting the Cologne Higher Regional Court on 05.08.1908
Judgment in the Peters appeal against the editor Gustav Brüggemann (Kölnische Zeitung) and the former governor Rudolf von Bennigsen for insulting the Cologne Regional Court on 16.05.1908
Other records and materials of Bennigsen and third parties: Letter of thanks from General von Liebert, Governor of D e u t s c h - O s t a f r i k a, for wedding congratulations
Peters' private suit against the editor Gustav Brüggemann (Kölnische Zeitung) and the former governor Rudolf von Bennigsen for insulting the court of lay assessors in Cologne: judgment of 13.01.1908
Photos from his stay in D e u t s c h - O s t a f r i k a, partly inscribed or commented by Rudolf Gansser, probably from the possession of his parents
Private lawsuit of Peters against the editor Gustav Brüggemann (Kölnische Zeitung) and the former governor Rudolf von Bennigsen for insult before the district court Stuttgart from 13.01.1908: witness statements
Resignation of Bennigsen from the management of the Hannover Department of the D e u t s c h e K o l o n i a l g e s e l s c h a f t - Letter of thanks from the President and the Board of the Hannover Department