BRIEF [O.A.] Osterwald, Wilhelm Author: Osterwald, Wilhelm Recipient: Haeckel, Carl Gottlob Dating: 06.03.1852
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 Osterwald, Wilhelm Author: Osterwald, Wilhelm Recipient: Haeckel, Ernst Dating: 16.02.1853
BRIEF OHNE UMSCHLAG Osterwald, Wilhelm Author: Osterwald, Wilhelm Recipient: Haeckel, Ernst Dating: 15.12.1853
BRIEF OHNE UMSCHLAG Osterwald, Wilhelm Author: Osterwald, Wilhelm Recipient: Haeckel, Carl Gottlob Dating: 26.09.1855