BRIEF OHNE UMSCHLAG Lehotay, Maria von Author: Lehotay, Maria von Recipient: Haeckel, Ernst Dating: 03.08.1916
BRIEF [O.A.] Weinbrenner, Eugen Author: Weinbrenner, Eugen Recipient: Haeckel, Ernst Corporation: Selbstverlag Dating: 07.03.1916
POSTKARTE Thoden van Velzen, S... K... Author: Thoden van Velzen, S... K... Recipient: Haeckel, Ernst Dating: 27.12.1916
POSTKARTE Thoden van Velzen, Syo Kornelius Author: Thoden van Velzen, Syo Kornelius Recipient: Haeckel, Ernst Dating: 14.11.1916
POSTKARTE Schulze, Franz Eilhard Author: Schulze, Franz Eilhard Recipient: Haeckel, Ernst Dating: 22.07.1916
BRIEF [O.A.] Thoden van Velzen, S... K... Author: Thoden van Velzen, S... K... Recipient: Haeckel, Ernst Dating: 05.05.1916
POSTKARTE Thoden van Velzen, S... K... Author: Thoden van Velzen, S... K... Recipient: Haeckel, Ernst Dating: 14.05.1916
BRIEF [O.A.] Thoden van Velzen, S... K... Author: Thoden van Velzen, S... K... Recipient: Haeckel, Ernst Dating: 30.06.1916
POSTKARTE Schuster, Adolf Niklaus Author: Schuster, Adolf Niklaus Recipient: Haeckel, Ernst Dating: 03.10.1916
