BRIEF OHNE UMSCHLAG Haeckel, Charlotte Author: Haeckel, Charlotte Recipient: Haeckel, Ernst Dating: 13.07.1861
BRIEF OHNE UMSCHLAG Haeckel, Charlotte Author: Haeckel, Charlotte Recipient: Sethe, Anna Dating: 09.08.1859
BRIEF OHNE UMSCHLAG Haeckel, Charlotte Author: Haeckel, Charlotte Recipient: Sethe, Anna Dating: 29.08.1859