BRIEF [O.A.] Bucchich, Gregorio Author: Bucchich, Gregorio Recipient: Haeckel, Ernst Dating: 28.12.1893
BRIEF [O.A.] Chierchia, Gaetano Author: Chierchia, Gaetano Recipient: Haeckel, Ernst Corporation: Ministero della Marina Dating: 18.01.1893
BRIEF [O.A.] Cassiere, G... Author: Cassiere, G... Recipient: Haeckel, Ernst Corporation: Société d'Étude des Sciences Naturelles Dating: 16.10.1893
BRIEF [O.A.] Edwards, Arthur M... Author: Edwards, Arthur M... Recipient: Haeckel, Ernst Dating: 20.06.1893
BRIEF [O.A.] Reinicke, Emanuel Author: Reinicke, Emanuel Recipient: Haeckel, Ernst Corporation: Wilhelm Engelmann Verlagsbuchhandlung Dating: 22.04.1893
