BRIEF OHNE UMSCHLAG Hetzer, Wilhelm Author: Hetzer, Wilhelm Recipient: Haeckel, Ernst Dating: 24.07.1852
BRIEF OHNE UMSCHLAG Osterwald, Wilhelm Author: Osterwald, Wilhelm Recipient: Haeckel, Ernst Dating: 04.04.1852
BRIEF OHNE UMSCHLAG Osterwald, Wilhelm Author: Osterwald, Wilhelm Recipient: Haeckel, Ernst Dating: 03.05.1852
BRIEF OHNE UMSCHLAG Kalisky, Friederike Author: Kalisky, Friederike Recipient: Haeckel, Ernst Dating: 15.02.1852
BRIEF OHNE UMSCHLAG Haeckel, Hermine Author: Haeckel, Hermine Recipient: Haeckel, Ernst Dating: 09.12.1852