BRIEF [O.A.] Lombardo, Franz Jama Author: Lombardo, Franz Jama Recipient: Haeckel, Ernst Dating: 01.06.1896
BRIEF [O.A.] Paratore, Emanuel Author: Paratore, Emanuel Recipient: Haeckel, Ernst Dating: 14.04.1898
BRIEF [O.A.] Nicotra, Leopoldo Author: Nicotra, Leopoldo Recipient: Haeckel, Ernst Dating: 04.09.1877
BRIEF [O.A.] Nicotra, Leopoldo Author: Nicotra, Leopoldo Recipient: Haeckel, Ernst Dating: 15.09.1880
BRIEF [O.A.] Nicotra, Leopoldo Author: Nicotra, Leopoldo Recipient: Haeckel, Ernst Dating: 30.05.1904
BRIEF [O.A.] Miklucho-Maclay, Nikolaj N... Author: Miklucho-Maclay, Nikolaj N... Recipient: Haeckel, Ernst Dating: 16.01.1869
BRIEF [O.A.] Segnenza, Giuseppe Author: Segnenza, Giuseppe Recipient: Haeckel, Ernst Dating: 01.11.1869
BRIEF [O.A.] Segnenza, Giuseppe Author: Segnenza, Giuseppe Recipient: Haeckel, Ernst Dating: 02.06.1881
BRIEF [O.A.] Haeckel, Ernst Author: Haeckel, Ernst Recipient: Haeckel, Carl Gottlob Dating: 10.03.1866