BRIEF OHNE UMSCHLAG Krause, Adelheid Author: Krause, Adelheid Recipient: Haeckel, Ernst Dating: 24.08.1901
BRIEF OHNE UMSCHLAG Vetter, Benjamin Author: Vetter, Benjamin Recipient: Haeckel, Ernst Dating: 15.08.1878
BRIEF OHNE UMSCHLAG Sigg-Wagner, Hermann Author: Sigg-Wagner, Hermann Recipient: Haeckel, Ernst Dating: 04.01.1901
BRIEF OHNE UMSCHLAG Becker, Franz Johann Jakob Emil Author: Becker, Franz Johann Jakob Emil Recipient: Haeckel, Ernst Dating: 29.11.1914
BRIEF OHNE UMSCHLAG Becker, Franz Johann Jakob Emil Author: Becker, Franz Johann Jakob Emil Recipient: Haeckel, Ernst Dating: 09.12.1914
BRIEF OHNE UMSCHLAG Becker, Franz Johann Jakob Emil Author: Becker, Franz Johann Jakob Emil Recipient: Haeckel, Ernst Dating: 12.12.1914
BRIEF OHNE UMSCHLAG Becker, Franz Johann Jakob Emil Author: Becker, Franz Johann Jakob Emil Recipient: Haeckel, Ernst Dating: 15.01.1915
BRIEF OHNE UMSCHLAG Suter, Karl Friedrich Author: Suter, Karl Friedrich Recipient: Haeckel, Ernst Dating: 10.10.1901
BRIEF OHNE UMSCHLAG Kraigher-Porges, Josepha Author: Kraigher-Porges, Josepha Recipient: Haeckel, Ernst Dating: 05.10.1900