BRIEF OHNE UMSCHLAG Paul, C. Kegan Author: Paul, C. Kegan Recipient: Haeckel, Ernst Dating: 25.09.1879
BRIEF OHNE UMSCHLAG Schmitz, L. Dora Author: Schmitz, L. Dora Recipient: Haeckel, Ernst Dating: 15.08.1879
BRIEF OHNE UMSCHLAG Schmitz, L. Dora Author: Schmitz, L. Dora Recipient: Haeckel, Ernst Dating: 07.12.1879
BRIEF OHNE UMSCHLAG Lankester, Edwin Ray Author: Lankester, Edwin Ray Recipient: Haeckel, Ernst Dating: 13.09.1879
BRIEF OHNE UMSCHLAG Lankester, Edwin Ray Author: Lankester, Edwin Ray Recipient: Haeckel, Ernst Dating: 13.10.1879