BRIEF OHNE UMSCHLAG Eggeling, Heinrich Author: Eggeling, Heinrich Recipient: Haeckel, Ernst Corporation: Akademische Immediat-Finanz-Commission Dating: 27.06.1888
BRIEF OHNE UMSCHLAG Hertzog, Paul Siegmund Author: Hertzog, Paul Siegmund Recipient: Haeckel, Ernst Dating: 17.01.1888
BILDPOSTKARTE Hahn, Ernst; Hahn, Marie, geb. Haeckel Author: Hahn, Ernst; Hahn, Marie, geb. Haeckel Recipient: Haeckel, Ernst Dating: 15.02.1888
BRIEF OHNE UMSCHLAG Burbach, Marie Author: Burbach, Marie Recipient: Haeckel, Ernst Dating: 23.04.1888
BRIEF OHNE UMSCHLAG Engelmann, Theodor Wilhelm Author: Engelmann, Theodor Wilhelm Recipient: Haeckel, Ernst Dating: 20.07.1888
BRIEF OHNE UMSCHLAG Ritter, Paul von Author: Ritter, Paul von Recipient: Haeckel, Ernst Dating: 01.06.1888
BRIEF OHNE UMSCHLAG Murray, John Author: Murray, John Recipient: Haeckel, Ernst Corporation: Challenger Expedition Office Dating: 03.12.1888
