TELEGRAMM Bockelmann, Maria Francisca Author: Bockelmann, Maria Francisca Recipient: Haeckel, Ernst Dating: 07.03.1917
TELEGRAMM Klinghammer, Waldemar Author: Klinghammer, Waldemar Recipient: Haeckel, Ernst Dating: 16.02.1911
TELEGRAMM Hellbach, Rudolf; Speerschneider, Julius; Lehmann, Georg Author: Hellbach, Rudolf; Speerschneider, Julius; Lehmann, Georg Recipient: Haeckel, Ernst Dating: 17.02.1894
TELEGRAMM Bockelmann, Friedrich Author: Bockelmann, Friedrich Recipient: Haeckel, Ernst Dating: 16.02.1894