BRIEF [O.A.] Haeckel, Ernst Author: Haeckel, Ernst Recipient: Haeckel, Carl & Charlotte [Eltern] Dating: 17.08.1859
BRIEF OHNE UMSCHLAG Radonetz, Eduard Author: Radonetz, Eduard Recipient: Haeckel, Ernst Dating: 01.12.1885
BRIEF [O.A.] Gargantini, Cesare Author: Gargantini, Cesare Recipient: Haeckel, Ernst Dating: ??.02.1903
BRIEF OHNE UMSCHLAG Götzlik, Ernesto Author: Götzlik, Ernesto Recipient: Haeckel, Ernst Dating: ??.02.1904
BRIEF [O.A.] Goldscheid, Rudolf Author: Goldscheid, Rudolf Recipient: Haeckel, Ernst Dating: 10.08.1913
BRIEF [O.A.] Goldscheid, Rudolf Author: Goldscheid, Rudolf Recipient: Haeckel, Ernst Dating: 16.08.1913
BRIEF [O.A.] Genovese, Francesco Author: Genovese, Francesco Recipient: Haeckel, Ernst Dating: 15.10.1899
POSTKARTE Gagliardi, A... Author: Gagliardi, A... Recipient: Haeckel, Ernst Corporation: Gabinetto d' Antropologia Pedagogica Dating: 31.05.1910