BRIEF [O.A.] Carus, Julius Victor Author: Carus, Julius Victor Recipient: Haeckel, Ernst Dating: 21.04.1875
BRIEF [O.A.] Carus, Julius Victor Author: Carus, Julius Victor Recipient: Haeckel, Ernst Dating: 14.06.1875
BRIEF OHNE UMSCHLAG Floto, Hartwig Author: Floto, Hartwig Recipient: Haeckel, Ernst Dating: 05.10.1875
BRIEF [O.A.] Edelsheim, Freiherr von Author: Edelsheim, Freiherr von Recipient: Haeckel, Ernst Corporation: Der Oberhofmeister Ihrer Königlichen Hoheit der Grosherzogin von Baden Dating: 26.12.1875
