BRIEF [O.A.] Bucchich, Gregorio Author: Bucchich, Gregorio Recipient: Haeckel, Ernst Dating: 08.10.1875
BRIEF [O.A.] Bucchich, Gregorio Author: Bucchich, Gregorio Recipient: Haeckel, Ernst Dating: 02.11.1875
BRIEF [O.A.] Bucchich, Gregorio Author: Bucchich, Gregorio Recipient: Haeckel, Ernst Dating: 09.12.1875
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