BRIEF OHNE UMSCHLAG Cischini, Josef Ritter von Author: Cischini, Josef Ritter von Recipient: Haeckel, Ernst Dating: 16.10.1873
BRIEF [O.A.] Seewald, von G... [Konsul] Author: Seewald, von G... [Konsul] Recipient: Haeckel, Ernst Dating: 31.05.1873
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Haeckel, Charlotte Dating: 15.03.1873
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Haeckel, Charlotte Dating: 23.03.1873