BRIEF OHNE UMSCHLAG Darwin, Charles Author: Darwin, Charles Recipient: Haeckel, Ernst Dating: 27.12.1871
BRIEF OHNE UMSCHLAG Stremayr, Karl Ritter von Author: Stremayr, Karl Ritter von Recipient: Haeckel, Ernst Dating: 29.01.1871
BRIEF [O.A.] Czarnecki, Johann Author: Czarnecki, Johann Recipient: Haeckel, Ernst Dating: 15.04.1871
BRIEF [O.A.] Czarnecki, Johann Author: Czarnecki, Johann Recipient: Haeckel, Ernst Dating: 01.08.1871
BRIEF [O.A.] Czarnecki, Johann Author: Czarnecki, Johann Recipient: Haeckel, Ernst Dating: 24.10.1871
BRIEF [O.A.] Sethe, Wilhelmine (geb. Bölling) Author: Sethe, Wilhelmine (geb. Bölling) Recipient: Haeckel, Ernst Dating: 19.01.1871
BRIEF OHNE UMSCHLAG Haeckel, Charlotte Author: Haeckel, Charlotte Recipient: Haeckel, Ernst Dating: 31.05.1871
BRIEF OHNE UMSCHLAG Haeckel, Charlotte Author: Haeckel, Charlotte Recipient: Haeckel, Ernst Dating: 27.06.1871
BRIEF OHNE UMSCHLAG Haeckel, Charlotte Author: Haeckel, Charlotte Recipient: Haeckel, Agnes Dating: 02.07.1871