BRIEF [O.A.] Baerenbach, Friedrich von Author: Baerenbach, Friedrich von Recipient: Haeckel, Ernst Dating: 12.06.1878
BRIEF [O.A.] Baerenbach, Friedrich von Author: Baerenbach, Friedrich von Recipient: Haeckel, Ernst Dating: 25.07.1878
BRIEF [O.A.] Baerenbach, Friedrich von Author: Baerenbach, Friedrich von Recipient: Haeckel, Ernst Dating: 08.08.1878
BRIEF [O.A.] Baerenbach, Friedrich von Author: Baerenbach, Friedrich von Recipient: Haeckel, Ernst Dating: 11.11.1878
BRIEF [O.A.] Alglave, Emile Author: Alglave, Emile Recipient: Haeckel, Ernst Corporation: Revue Politique et Littéraire, Revue Scientifique Dating: 04.01.1878
BRIEF [O.A.] Stearn, Walter R... Author: Stearn, Walter R... Recipient: Haeckel, Ernst Corporation: Nuwara Eliya Club Dating: 19.02.1878
BRIEF [O.A.] Williamson, W... C... Author: Williamson, W... C... Recipient: Haeckel, Ernst Corporation: The Owens College Dating: 12.11.1878