BRIEF OHNE UMSCHLAG Haeckel, Carl Gottlob Author: Haeckel, Carl Gottlob Recipient: Bassewitz (Basewitz), Adelheid von Dating: 11.03.1864
BRIEF OHNE UMSCHLAG Haeckel, Carl Gottlob Author: Haeckel, Carl Gottlob Recipient: Bassewitz, Adelheid von Dating: 17.02.1864
BRIEF OHNE UMSCHLAG Haeckel, Carl Gottlob Author: Haeckel, Carl Gottlob Recipient: Bassewitz (Basewitz), Adelheid von Dating: 27.09.1864
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Allmers, Hermann Dating: 14.05.1860
BILDPOSTKARTE Rottenburg, Paul von Author: Rottenburg, Paul von Recipient: Haeckel, Ernst Dating: 12.04.1902
BRIEF [O.A.] Kappstein, Theodor Author: Kappstein, Theodor Recipient: Haeckel, Ernst Dating: 14.10.1908