BILDPOSTKARTE Ammon, Sophie von Author: Ammon, Sophie von Recipient: Haeckel, Agnes Dating: 1908.??.?? [?]
BRIEF [O.A.] Barry Author: Barry Recipient: Haeckel, Ernst Corporation: Cabinet du Khedive Dating: 21.03.1876
BRIEF [O.A.] Abayawira, M. P. Abraham Author: Abayawira, M. P. Abraham Recipient: Haeckel, Ernst Dating: 20.12.1899
BRIEF OHNE UMSCHLAG Rémy-Berzencovich von Szillas, Emil Otto Author: Rémy-Berzencovich von Szillas, Emil Otto Recipient: Haeckel, Ernst Dating: 14.02.1877
BRIEF OHNE UMSCHLAG Rémy-Berzencovich von Szillas, Emil Otto Author: Rémy-Berzencovich von Szillas, Emil Otto Recipient: Haeckel, Ernst Dating: 01.02.1876
BRIEF [O.A.] Klunzinger, Carl Benjamin Author: Klunzinger, Carl Benjamin Recipient: Haeckel, Ernst Dating: ??.10.1864