BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Linck, Gottlob Dating: 31.01.1913
BRIEF [O.A.] Dorovius, E... Author: Dorovius, E... Recipient: Haeckel, Ernst Corporation: Verein für Feuerbestattungen Jena Dating: 04.02.1913
BRIEF OHNE UMSCHLAG Dietrich, Rudolf Author: Dietrich, Rudolf Recipient: Haeckel, Ernst Dating: 09.11.1913
BRIEF [O.A.] Dieckmann, Gertha Author: Dieckmann, Gertha Recipient: Haeckel, Ernst Dating: 06.02.1913
BRIEF [O.A.] Dieckmann, Gertha Author: Dieckmann, Gertha Recipient: Haeckel, Ernst Dating: 17.02.1913
BRIEF OHNE UMSCHLAG Engelmann, Emma Author: Engelmann, Emma Recipient: Haeckel, Ernst Dating: 15.02.1913
BRIEF [O.A.] Vogt, H... Author: Vogt, H... Recipient: Haeckel, Ernst Corporation: Forner & Vogt, Atelier für wissenschaftliche Projection Dating: 06.11.1913
