• (1913) 1941 - 1971, Landesarchiv Sachsen-Anhalt, H 51 (place of use: Wernigerode) Gutsarchiv Deersheim description: Contains: Exchange of letters with von Arnim, 1949-1969. - Excerpt from: Quarterly Issues for Contemporary History 8th Volume 1960 - Wolfgang Abendroth: Die Schwarze Front. - Hedy von Arnim and the family history of Treskow and von Peucker. - Research and correspondence concerning the bourgeois family von Gustedt, 1944 - Excerpts from the church register of Roklum. - Exchange of letters with the Protestant parish office in Calbe (Saale). - Photo of Mr. von Armin and his wife. - Exchange of letters with Wilk von Gustedt, 1967-1971 - Genealogy of Treskow with photos and negatives. - Excerpts from: Preußische Zeitung" No. 481 from October 14, 1913 - Special print from: "Westfalia Numismatica" Münster 1963 - Letter from Senta von Gustedt to Wilk von Gustedt with drawing, 1969 - Exchange of letters with Rüdiger von Gustedt about family archive and others, 1943-1967 - Exchange of letters with Dr. Becker Gleimhaus Halberstadt, 1941-1944. Contained: Exchange of letters with von Arnim, 1949-1969. - Excerpt from: Quarterly Issues for Contemporary History 8th Volume 1960 - Wolfgang Abendroth: Die Schwarze Front. - Hedy von Arnim and the family history of Treskow and von Peucker. - Research and correspondence concerning the bourgeois family von Gustedt, 1944 - Excerpts from the church register of Roklum. - Exchange of letters with the Protestant parish office in Calbe (Saale). - Photo of Mr. von Armin and his wife. - Exchange of letters with Wilk von Gustedt, 1967-1971 - Genealogy of Treskow with photos and negatives. - Excerpts from: Preußische Zeitung" No. 481 from October 14, 1913 - special print from: "Westfalia Numismatica" Münster 1963 - letter from Senta von Gustedt to Wilk von Gustedt with drawing, 1969 - correspondence with Rüdiger von Gustedt about family archive and others, 1943-1967 - correspondence with Dr. Becker Gleimhaus Halberstadt, 1941-1944.

1841-1854 in Kommaggas, Bethanien, Tulbagh, 1852-1854 in Capeland, from 1854 back in Norway, s.a. RMG 2.598, parts of the file heavily damaged; curriculum vitae, 1841; letters and diaries of Knudsen 1841 1844-1854; letter from Daniel Cloete, Bethanien, 1854;