BRIEF OHNE UMSCHLAG Haeckel, Charlotte Author: Haeckel, Charlotte Recipient: Haeckel, Ernst Dating: 04.07.1872
BRIEF OHNE UMSCHLAG Günther, Wilhelm August Author: Günther, Wilhelm August Recipient: Haeckel, Ernst Dating: 29.03.1872
BRIEF OHNE UMSCHLAG Carneri, Bartholomäus von Author: Carneri, Bartholomäus von Recipient: Haeckel, Ernst Dating: 26.07.1872
BRIEF OHNE UMSCHLAG Spencer, Herbert Author: Spencer, Herbert Recipient: Haeckel, Ernst Dating: 24.01.1872
BRIEF OHNE UMSCHLAG Cohn, Albert Author: Cohn, Albert Recipient: Haeckel, Ernst Corporation: A. Asher & Co., (Albert Cohn), Buchhandlung Dating: 07.09.1872
