BRIEF [O.A.] Starck, Emilie Author: Starck, Emilie Recipient: Haeckel, Ernst Corporation: Vinola Wine Ranche
BRIEFABSCHRIFT Ritter, Paul von Author: Ritter, Paul von Recipient: Haeckel, Ernst Dating: 07.01.1886
BRIEF OHNE UMSCHLAG Harnier, Eduard von Author: Harnier, Eduard von Recipient: Haeckel, Ernst Dating: 30.05.1886
BRIEF OHNE UMSCHLAG Haeckel, Carl Gottlob; Haeckel, Charlotte Author: Haeckel, Carl Gottlob; Haeckel, Charlotte Recipient: Haeckel, Ernst; Haeckel, Karl Dating: vor dem 10.05.1865