BRIEF [O.A.] Eber, Almi Author: Eber, Almi Recipient: Haeckel, Ernst Corporation: Verein Merkur Dating: 05.06.1883
BRIEF OHNE UMSCHLAG Erdmann, Gustav Adolf Author: Erdmann, Gustav Adolf Recipient: Haeckel, Ernst Dating: 15.02.1883
BRIEF OHNE UMSCHLAG Erdmann, Gustav Adolf Author: Erdmann, Gustav Adolf Recipient: Haeckel, Ernst Dating: 31.12.1883
BRIEF [O.A.] Eberstein, M... Freiherr von Author: Eberstein, M... Freiherr von Recipient: Haeckel, Ernst Dating: 16.06.1883
BRIEF [O.A.] Gerhardt, Dietrich Author: Gerhardt, Dietrich Recipient: Haeckel, Ernst Dating: 01.08.1883
BRIEF OHNE UMSCHLAG Göldi, Emil August Author: Göldi, Emil August Recipient: Haeckel, Ernst Dating: 28.04.1883
BRIEF [O.A.] Göldi, Emil August Author: Göldi, Emil August Recipient: Haeckel, Ernst Dating: 27.05.1883
BRIEF [O.A.] Göldi, Emil August Author: Göldi, Emil August Recipient: Haeckel, Ernst Dating: 13.06.1883
