BRIEF OHNE UMSCHLAG Haeckel, Carl Gottlob Author: Haeckel, Carl Gottlob Recipient: Haeckel, Ernst Dating: 09.06.1862
BRIEF OHNE UMSCHLAG Haeckel, Hermine Author: Haeckel, Hermine Recipient: Haeckel, Ernst Dating: 13.11.1860
BRIEF OHNE UMSCHLAG Haeckel, Carl Gottlob Author: Haeckel, Carl Gottlob Recipient: Sethe, Anna Dating: 08.06.1862