BRIEF OHNE UMSCHLAG Carter, Franklin B. Author: Carter, Franklin B. Recipient: Haeckel, Ernst Dating: 28.11.1892
BRIEF OHNE UMSCHLAG Carter, Franklin B. Author: Carter, Franklin B. Recipient: Haeckel, Ernst Dating: 05.12.1892
BRIEF MIT UMSCHLAG Carter, Franklin B. Author: Carter, Franklin B. Recipient: Haeckel, Ernst Dating: 06.01.1893
BRIEF OHNE UMSCHLAG Carter, Franklin B. Author: Carter, Franklin B. Recipient: Haeckel, Ernst Dating: 23.01.1893
BRIEF OHNE UMSCHLAG Carter, Franklin B. Author: Carter, Franklin B. Recipient: Haeckel, Ernst Dating: 16.02.1893
POSTKARTE Kertscher, Herbert R... Author: Kertscher, Herbert R... Recipient: Haeckel, Ernst Dating: 25.12.1913
BRIEF [O.A.] Kertscher, Herbert R... Author: Kertscher, Herbert R... Recipient: Haeckel, Ernst Corporation: Edda Verlag, Berlin Dating: 04.02.1914