BRIEF OHNE UMSCHLAG Godeffroy, Cesar Author: Godeffroy, Cesar Recipient: Haeckel, Ernst Dating: 28.02.1881
BRIEF OHNE UMSCHLAG Schenk, August Author: Schenk, August Recipient: Haeckel, Ernst Dating: 25.09.1860
BRIEF OHNE UMSCHLAG Magnus, Rudolf Author: Magnus, Rudolf Recipient: Haeckel, Ernst Dating: 04.12.1910
BRIEF OHNE UMSCHLAG Bamberger, Johann Author: Bamberger, Johann Recipient: Haeckel, Ernst Dating: 03.03.1918
BRIEF OHNE UMSCHLAG Bamberger, Johann Author: Bamberger, Johann Recipient: Haeckel, Ernst Dating: 08.03.1918
BRIEF OHNE UMSCHLAG Bamberger, Johann Author: Bamberger, Johann Recipient: Haeckel, Ernst Dating: 12.03.1919
BRIEF OHNE UMSCHLAG Bamberger, Johann Author: Bamberger, Johann Recipient: Haeckel, Ernst Dating: ??.02.1914