PORTRÄTPOSTKARTE Schwaiger, Johannes Author: Schwaiger, Johannes Recipient: Haeckel, Ernst Dating: 16.02.1914
PORTRÄTPOSTKARTE Sprenger, Ernst Author: Sprenger, Ernst Recipient: Haeckel, Ernst Dating: 23.12.1914
PORTRÄTPOSTKARTE Haeckel, Walther Author: Haeckel, Walther Recipient: Haeckel, Ernst; Haeckel, Agnes [Eltern] Dating: 10.10.1914
PORTRÄTPOSTKARTE Haeckel, Ernst Author: Haeckel, Ernst Recipient: Sarasin, Paul; Sarasin, Fritz Dating: 23.12.1914
PORTRÄTPOSTKARTE Saal, Eduard Author: Saal, Eduard Recipient: Haeckel, Ernst Corporation: Deutsch-italienische Kunstgesangsschule Dating: 16.02.1914
PORTRÄTPOSTKARTE Blackwood, John Author: Blackwood, John Recipient: Haeckel, Ernst Dating: 15.02.1914
PORTRÄTPOSTKARTE Boettger, Thekla Author: Boettger, Thekla Recipient: Haeckel, Ernst Dating: 14.02.1914