BRIEF OHNE UMSCHLAG Sethe, Anna Author: Sethe, Anna Recipient: Haeckel, Carl Gottlob Dating: 16.03.1859
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Haeckel, Carl Gottlob Dating: 25.04.1859
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Haeckel, Carl Gottlob Dating: 25.06.1859
BRIEF OHNE UMSCHLAG Gegenbaur, Carl Author: Gegenbaur, Carl Recipient: Haeckel, Carl Gottlob Dating: 12.12.1859
BRIEF OHNE UMSCHLAG Haeckel, Karl Author: Haeckel, Karl Recipient: Haeckel, Carl Gottlob Dating: 29.07.1859
BRIEF OHNE UMSCHLAG Haeckel, Hermine Author: Haeckel, Hermine Recipient: Haeckel, Carl Gottlob Dating: 26.08.1859