BRIEF OHNE UMSCHLAG Hetzer, Wilhelm Author: Hetzer, Wilhelm Recipient: Haeckel, Ernst Dating: 02.09.1858
BRIEF OHNE UMSCHLAG Schubert, Adolph Author: Schubert, Adolph Recipient: Haeckel, Ernst Dating: 21.09.1858
BRIEF OHNE UMSCHLAG Hein, Reinhold Author: Hein, Reinhold Recipient: Haeckel, Ernst Dating: 21.09.1858
BRIEF OHNE UMSCHLAG Mulder, Lodewijk Author: Mulder, Lodewijk Recipient: Haeckel, Ernst Dating: 10.06.1858
BRIEF OHNE UMSCHLAG Mulder, Lodewijk Author: Mulder, Lodewijk Recipient: Haeckel, Ernst Dating: 11.12.1858
BRIEF OHNE UMSCHLAG Schubert, Adolph Author: Schubert, Adolph Recipient: Haeckel, Ernst Dating: 30.12.1858
BRIEF OHNE UMSCHLAG Schneider, Anton Author: Schneider, Anton Recipient: Haeckel, Ernst Dating: 25.07.1858