BRIEF OHNE UMSCHLAG Burdon-Sanderson, Ghetal Author: Burdon-Sanderson, Ghetal Recipient: Haeckel, Ernst Dating: 05.01.1877
BRIEF OHNE UMSCHLAG King, Henry S. Author: King, Henry S. Recipient: Haeckel, Ernst Corporation: Henry S. King & Co...Publishers Dating: 28.04.1877
BRIEF [O.A.] Scherzer, Ritter Karl von Author: Scherzer, Ritter Karl von Recipient: Haeckel, Ernst Dating: 30.01.1877