BRIEF OHNE UMSCHLAG Allmers, Hermann Author: Allmers, Hermann Recipient: Haeckel, Ernst Dating: 02.01.1861
BRIEF OHNE UMSCHLAG Barth, Heinrich Author: Barth, Heinrich Recipient: Haeckel, Ernst Dating: 07.01.1861
BRIEF OHNE UMSCHLAG Barth, Heinrich Author: Barth, Heinrich Recipient: Haeckel, Ernst Dating: 18.04.1861
BRIEF OHNE UMSCHLAG Gegenbaur, Carl Author: Gegenbaur, Carl Recipient: Haeckel, Ernst Dating: 16.03.1861
BRIEF OHNE UMSCHLAG Gegenbaur, Carl Author: Gegenbaur, Carl Recipient: Haeckel, Ernst Dating: 16.02.1861
BRIEF OHNE UMSCHLAG Gegenbaur, Carl Author: Gegenbaur, Carl Recipient: Haeckel, Ernst Dating: 24.10.1861
BRIEF [O.A.] Haeckel, Ernst Author: Haeckel, Ernst Recipient: Haeckel, Carl & Charlotte [Eltern] Dating: 29.06.1861
BRIEF [O.A.] Haeckel, Ernst Author: Haeckel, Ernst Recipient: Haeckel, Carl & Charlotte [Eltern] Dating: 24.04.1861