After Walter Bruno Henning’s untimely death in Berkeley (CA, USA) in 1967, his work materials, correspondence, and personal library seem to have remained in his home for some years. Contemporaries of Henning’s were convinced that his estate contained unpublished work of great value, and complained, sometimes bitterly, that they were prevented from making use of them. Yet some materials were in fact sent to colleagues, for at least several years after his death. But after this time, it does not appear that Henning’s unpublished work or other materials continued to be used by other scholars. His Nachlass re-surfaces in 1992 in the Guide to the Archival Materials of the German-speaking Emigration to the United States after 1933, where it is listed as still in Berkeley in the possession of his son-in-law Theodor B. Kahle. By 2008, the Nachlass (including unpublished working materials, correspondence, and personal library) was accessioned by the Deutsches Exilarchiv 1933-1945, part of the Deutsche Nationalbibliothek (Frankfurt, Germany). This inventory has been made on the basis of my personal inspection of the entire Nachlass at the Deutsches Exilarchiv during visits in 2022 and 2023.