Waldburg Papers. Vols. i-lxxviib. Frederika's diaries, in a variety of bindings and sizes. Some include photographs, newspaper clippings; 1911-1984. Seventy eight volumes.
Waldburg Papers. Vols. cxii a-p. Correspondence between Frederika and her sister Ellen Marvin; 1947-1980. Partly copies, typewritten, drafts, German. See also Add. 73026.
Waldburg Papers. Vols. cxxii, cxxiii. Correspondence and papers of Delbruck Schickler, stockbrokers, concerning shares and other financial matters; 1932-1971, n.d. See also Add. 73063. Two volumes.
Waldburg Papers. Vols. cxxiv-cxxvii. Correspondence and papers of Alfred Stockmann and Co., estate agents and property managers; 1943-1971. See also Add. 73036-73038 and Add. 73041, art. 1. Four volumes.
Waldburg Papers. Vols. cxxviii-cxxx. Correspondence and papers of Allgauer Treuhand, chartered accountants, relating to taxes, properties and other financial business; 1949-1979. See also Add. 73032-73035, Add. 73039, Add. 73044, art. 1. Three volumes.
Waldburg Papers. Vols. cxxxi, cxxxii. Correspondence and papers of Berliner Aktiengesellschaft für Industriebeteiligungen, mainly between Dr. Elly Bock and Frederika; 1949-1979. See also Add. 73032-73038. Two volumes.
Waldburg Papers. Vols. cxxxiv, cxxxv. Correspondence and papers of Dr Nath, lawyer, mostly relating to property; 1957-1960. See also Add. 73038. Two volumes.