BRIEF [O.A.] Beneke-Schröer, A... Author: Beneke-Schröer, A... Recipient: Haeckel, Ernst Dating: 12.12.1909
BRIEF [O.A.] Bessey, Charles E... Author: Bessey, Charles E... Recipient: Haeckel, Ernst Corporation: The University of Nebraska, Department of Botany Dating: 08.05.1909
BRIEF [O.A.] Behm, Hans Wolfgang Author: Behm, Hans Wolfgang Recipient: Haeckel, Ernst Dating: 11.04.1909
BRIEF [O.A.] Behm, Hans Wolfgang Author: Behm, Hans Wolfgang Recipient: Haeckel, Ernst Dating: 14.04.1909
BRIEF [O.A.] Behm, Hans Wolfgang Author: Behm, Hans Wolfgang Recipient: Haeckel, Ernst Dating: 04.11.1909
BRIEF [O.A.] Recipient: Haeckel, Ernst Corporation: Associazione Lombarda di Giornalisti Dating: ??.02.1909
BRIEF [O.A.] Bechhold, Heinrich Author: Bechhold, Heinrich Recipient: Haeckel, Ernst Dating: 05.01.1909
BRIEF [O.A.] Bechhold, Heinrich Author: Bechhold, Heinrich Recipient: Haeckel, Ernst Dating: 23.02.1909
BRIEF [O.A.] Beadnell, C... Marsh... Author: Beadnell, C... Marsh... Recipient: Haeckel, Ernst Corporation: H. M. S. King Alfred, China Station Dating: 12.03.1909