Charlotte Dorothea (Arndt) Rassow to Hartmuth Arndt, Platenberg, June 4, 1848, Box: 1, Folder: 24. Ernst Moritz Arndt collection, MS 378. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/538909 Accessed November 27, 2024.