POSTKARTE Haeckel, Ernst Author: Haeckel, Ernst Recipient: Siebold, Carl Theodor von Dating: 27.02.1881
POSTKARTE Scherzer, Ritter Karl von Author: Scherzer, Ritter Karl von Recipient: Haeckel, Ernst Dating: 19.10.1881
POSTKARTE Scherzer, Ritter Karl von Author: Scherzer, Ritter Karl von Recipient: Haeckel, Ernst Dating: 19.10.1881
POSTKARTE Haeckel, Ernst Author: Haeckel, Ernst Recipient: Haeckel, Agnes (geb. Huschke) Dating: 11.10.1881