BRIEF [O.A.] Schultze, Leonhard Author: Schultze, Leonhard Recipient: Haeckel, Ernst Dating: 31.08.1868
BRIEF OHNE UMSCHLAG Pringsheim, Nathanael Author: Pringsheim, Nathanael Recipient: Haeckel, Ernst Dating: 10.08.1868
BRIEF [O.A.] Gaedechens, Rudolph Author: Gaedechens, Rudolph Recipient: Haeckel, Ernst Dating: 15.11.1868
BRIEF OHNE UMSCHLAG Haeckel, Agnes (geb. Huschke) Author: Haeckel, Agnes (geb. Huschke) Recipient: Haeckel, Ernst Dating: 20.12.1868
BRIEF OHNE UMSCHLAG Haeckel, Agnes (geb. Huschke) Author: Haeckel, Agnes (geb. Huschke) Recipient: Haeckel, Ernst Dating: 18.12.1868
BRIEF OHNE UMSCHLAG Haeckel, Agnes (geb. Huschke) Author: Haeckel, Agnes (geb. Huschke) Recipient: Haeckel, Ernst Dating: 10.09.1868
BRIEF OHNE UMSCHLAG Haeckel, Agnes (geb. Huschke) Author: Haeckel, Agnes (geb. Huschke) Recipient: Haeckel, Ernst Dating: 06.09.1868