BRIEF OHNE UMSCHLAG Grazie, Marie Eugenie delle Author: Grazie, Marie Eugenie delle Recipient: Haeckel, Ernst Dating: 22.11.1907
BRIEF OHNE UMSCHLAG Schulze, O. Author: Schulze, O. Recipient: Meyer, Hans Corporation: Armendiakonie des Vereinshauses (Verein für Innere Mission) Dating: 12.02.1907
BRIEF [O.A.] Gorzawsky, Hubert Author: Gorzawsky, Hubert Recipient: Haeckel, Ernst Dating: 23.09.1907
BRIEF [O.A.] Goubin, L... Author: Goubin, L... Recipient: Haeckel, Ernst Corporation: Museum d'Histoire Naturelle, Laboratoire de Malacologie Dating: 16.08.1907
BRIEF [O.A.] Recipient: Haeckel, Ernst Corporation: Der Gemeindevorstand der Residenz- und Universitätsstadt Jena Dating: 09.03.1907
BRIEF [O.A.] Gutmann, Herm... A... Author: Gutmann, Herm... A... Recipient: Haeckel, Ernst Dating: 01.01.1907