BRIEF [O.A.] Bellesme, Jousset de Author: Bellesme, Jousset de Recipient: Haeckel, Ernst Dating: 03.12.1910
POSTKARTE Bellesme, Jousset de Author: Bellesme, Jousset de Recipient: Haeckel, Ernst Dating: 05.02.1911
BRIEF [O.A.] Recipient: Haeckel, Ernst Corporation: Académie Royale des Sciences, des Lettres ...Bruxelles Dating: 15.12.1897
BRIEF [O.A.] Recipient: Haeckel, Ernst Corporation: Académie Royale des Sciences, des Lettres ...Bruxelles Dating: 26.02.1904
BRIEF [O.A.] Recipient: Haeckel, Ernst Corporation: Académie Royale des Sciences, des Lettres ...Bruxelles Dating: 04.05.1906
BRIEF [O.A.] Recipient: Haeckel, Ernst Corporation: Académie Royale des Sciences, des Lettres ...Bruxelles Dating: 15.12.1897
BRIEF [O.A.] Detadelur, C... F... Author: Detadelur, C... F... Recipient: Haeckel, Ernst Dating: 10.03.1907
BRIEF [O.A.] Furnemont, Leo Author: Furnemont, Leo Recipient: Haeckel, Ernst Corporation: Fédération Internationale de la Libre Pensée Dating: 18.06.1904