BRIEF [O.A.] Starck, Emilie Author: Starck, Emilie Recipient: Haeckel, Ernst Corporation: Vinola Wine Ranche
BRIEF [O.A.] Rottenburg, Paul von Author: Rottenburg, Paul von Recipient: Haeckel, Ernst Dating: 06.06.1884
BRIEF [O.A.] Scherzer, Ritter Karl von Author: Scherzer, Ritter Karl von Recipient: Haeckel, Ernst Dating: 30.03.1878