BRIEF OHNE UMSCHLAG Spencer, Herbert Author: Spencer, Herbert Recipient: Haeckel, Ernst Dating: 24.01.1872
BRIEF OHNE UMSCHLAG King, Henry S. Author: King, Henry S. Recipient: Haeckel, Ernst Corporation: Henry S. King & Co...Publishers Dating: 27.01.1872
BRIEF OHNE UMSCHLAG Lubbock, John Author: Lubbock, John Recipient: Haeckel, Ernst Corporation: Ray Society Dating: 09.03.1872
BRIEF OHNE UMSCHLAG Spencer, Herbert Author: Spencer, Herbert Recipient: Haeckel, Ernst Dating: 02.01.1872