BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Haeckel, Charlotte Dating: 25.08.1878
BRIEF OHNE UMSCHLAG Barbier (Witwe von Edmond Barbier) Author: Barbier (Witwe von Edmond Barbier) Recipient: Haeckel, Ernst Dating: 16.05.1886
BRIEF OHNE UMSCHLAG Hartnack, Edmund Author: Hartnack, Edmund Recipient: Haeckel, Ernst Dating: 20.01.1857
BRIEF OHNE UMSCHLAG Ritter, Paul von Author: Ritter, Paul von Recipient: Haeckel, Ernst Dating: 29.03.1894
BRIEF OHNE UMSCHLAG Quillet, Aristide Author: Quillet, Aristide Recipient: Haeckel, Ernst Dating: 18.12.1912
BRIEF OHNE UMSCHLAG Ritter, Paul von Author: Ritter, Paul von Recipient: Haeckel, Ernst Dating: 24.03.1894
