PORTRÄTPOSTKARTE Haeckel, Ernst Author: Haeckel, Ernst Recipient: Heldburg, Helene von Dating: 30.05.1910
PORTRÄTPOSTKARTE Haeckel, Ernst Author: Haeckel, Ernst Recipient: Schweninger, Ernst Dating: 15.06.1910
PORTRÄTPOSTKARTE Haeckel, Ernst Author: Haeckel, Ernst Recipient: Focke, Wilhelm Olbers Dating: 01.01.1910
PORTRÄTPOSTKARTE Haeckel, Ernst Author: Haeckel, Ernst Recipient: Sprenger, Therese; Sprenger, Gustav Dating: 22.07.1910
PORTRÄTPOSTKARTE Haeckel, Ernst Author: Haeckel, Ernst Recipient: Altmann-Bronn, Ida Dating: 17.08.1910
PORTRÄTPOSTKARTE Haeckel, Ernst Author: Haeckel, Ernst Recipient: Jacobsohn, Siegfried Dating: 08.01.1910
PORTRÄTPOSTKARTE Lehmann-Hohenberg, Johannes Author: Lehmann-Hohenberg, Johannes Recipient: Haeckel, Ernst Dating: 18.09.1910
PORTRÄTPOSTKARTE Haeckel, Ernst Author: Haeckel, Ernst Recipient: Sprenger, Therese Dating: 16.02.1910