BRIEF [O.A.] Haltermann, Hermann Author: Haltermann, Hermann Recipient: Haeckel, Ernst Dating: 08.04.1869
BRIEF [O.A.] Haltermann, Hermann Author: Haltermann, Hermann Recipient: Haeckel, Ernst Dating: 20.03.1869
BRIEF [O.A.] Scherzer, Ritter Karl von Author: Scherzer, Ritter Karl von Recipient: Haeckel, Ernst Corporation: Ministerium für Handel und Volkswirthschaft Dating: 19.11.1869
BRIEF [O.A.] Scherzer, Ritter Karl von Author: Scherzer, Ritter Karl von Recipient: Haeckel, Ernst Dating: 18.12.1869
BRIEF [O.A.] Lüderitz, C... G... Author: Lüderitz, C... G... Recipient: Haeckel, Ernst Dating: 14.06.1869
