TELEGRAMM Huss, Max; Huss, Helene Author: Huss, Max; Huss, Helene Recipient: Haeckel, Ernst Dating: 17.02.1894
TELEGRAMM Britton, Nathaniel Author: Britton, Nathaniel Recipient: Haeckel, Ernst Corporation: Academy of Sciences New York Dating: 16.02.1894
TELEGRAMM Carus, Paul; Hegeler, Edward C. Author: Carus, Paul; Hegeler, Edward C. Recipient: Haeckel, Ernst Dating: 16.02.1894