BRIEF [O.A.] Schimmelmann, Frh. Hugo von Author: Schimmelmann, Frh. Hugo von Recipient: Haeckel, Ernst Dating: 09.02.1919
BRIEF [O.A.] Schimmelmann, Frh. Hugo von Author: Schimmelmann, Frh. Hugo von Recipient: Haeckel, Ernst Dating: 11.02.1919
BRIEF [O.A.] Hahn, Franz Josef Author: Hahn, Franz Josef Recipient: Haeckel, Ernst Dating: 19.02.1919
BRIEF [O.A.] Kreibich, J... K... Author: Kreibich, J... K... Recipient: Haeckel, Ernst Dating: 12.02.1919
BRIEF [O.A.] Ludowici, Wilhelm Author: Ludowici, Wilhelm Recipient: Haeckel, Ernst Dating: 02.02.1919
BRIEF [O.A.] Ludowici, Wilhelm Author: Ludowici, Wilhelm Recipient: Haeckel, Ernst Dating: 13.05.1919