BRIEF [O.A.] Carus, Julius Victor Author: Carus, Julius Victor Recipient: Haeckel, Ernst Dating: 05.01.1881
BRIEF [O.A.] Scherzer, Ritter Karl von Author: Scherzer, Ritter Karl von Recipient: Haeckel, Ernst Dating: 10.02.1881
BRIEF [O.A.] Scherzer, Ritter Karl von Author: Scherzer, Ritter Karl von Recipient: Haeckel, Ernst Dating: 16.10.1881
BRIEF [O.A.] Scherzer, Ritter Karl von Author: Scherzer, Ritter Karl von Recipient: Haeckel, Ernst Dating: 18.10.1881
POSTKARTE Scherzer, Ritter Karl von Author: Scherzer, Ritter Karl von Recipient: Haeckel, Ernst Dating: 19.10.1881
BRIEF [O.A.] Marshall, William Author: Marshall, William Recipient: Haeckel, Ernst Dating: 12.03.1881
BRIEF OHNE UMSCHLAG Sacher-Masoch, Leopold von Author: Sacher-Masoch, Leopold von Recipient: Haeckel, Ernst Dating: 16.08.1881
BRIEF [O.A.] Sellin, A... W... Author: Sellin, A... W... Recipient: Haeckel, Ernst Corporation: Zweigverein Lzg. für Handelsgeo. & Förderung dt. Int. im Auslande Dating: 06.03.1881