BILDPOSTKARTE Haeckel, Ernst Author: Haeckel, Ernst Recipient: Heldburg, Helene von Dating: 02.04.1919
BRIEFABSCHRIFT Wuttig Author: Wuttig Recipient: Haeckel, Ernst Corporation: Großherzoglich-Sächsisches Departement des Kultus Dating: 31.01.1919
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Hedemann, Justus Wilhelm Dating: 31.05.1919
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Hedemann, Justus Wilhelm Dating: 05.06.1919
BRIEFENTWURF Hedemann, Justus Wilhelm Author: Hedemann, Justus Wilhelm Recipient: Haeckel, Ernst Dating: 06.06.1919
ABSCHRIFT Paulssen, Arnold Author: Paulssen, Arnold Recipient: Haeckel, Ernst Corporation: Kultusministerium des Freistaates Sachsen Weimar Eisenach Dating: 11.07.1919
BRIEF OHNE UMSCHLAG Böttger, Lilly Author: Böttger, Lilly Recipient: Haeckel, Ernst Dating: 22.06.1919