BILDPOSTKARTE Bardeleben, Karl von et al. Author: Bardeleben, Karl von et al. Recipient: Haeckel, Ernst Dating: 27.10.1902
BILDPOSTKARTE Heldburg, Helene Freifrau von Author: Heldburg, Helene Freifrau von Recipient: Haeckel, Ernst Dating: 30.03.1902
BILDPOSTKARTE Kraigher-Porges, Josepha Author: Kraigher-Porges, Josepha Recipient: Haeckel, Ernst Dating: 31.03.1902
BILDPOSTKARTE Rottenburg, Paul von Author: Rottenburg, Paul von Recipient: Haeckel, Ernst Dating: 28.08.1902
BILDPOSTKARTE Ihering, Hermann von Author: Ihering, Hermann von Recipient: Haeckel, Ernst Dating: 13.12.1902
BILDPOSTKARTE Haeckel, Walther; Haeckel, Josefa Author: Haeckel, Walther; Haeckel, Josefa Recipient: Haeckel, Ernst Dating: 22.03.1902
BILDPOSTKARTE Sethe, Bertha; Haeckel, Julius Author: Sethe, Bertha; Haeckel, Julius Recipient: Haeckel, Ernst Dating: 06.07.1902