BRIEF [O.A.] Dubsky, Max Author: Dubsky, Max Recipient: Haeckel, Ernst Corporation: Rite Écossais Ancien Accepté Dating: 06.06.1907
BRIEF [O.A.] Calemard du Genestonse, Magdeleine Author: Calemard du Genestonse, Magdeleine Recipient: Haeckel, Ernst Dating: 31.01.1907
BRIEF [O.A.] Goubin, L... Author: Goubin, L... Recipient: Haeckel, Ernst Corporation: Museum d'Histoire Naturelle, Laboratoire de Malacologie Dating: 16.08.1907
BRIEF [O.A.] Richet, Georges Author: Richet, Georges Recipient: Haeckel, Ernst Corporation: Societé d´Editions Litteraires & Artistiques Dating: 30.03.1907
BRIEF [O.A.] Le Bon, Gustave Author: Le Bon, Gustave Recipient: Haeckel, Ernst Corporation: Bibliothèque de Philosophie Scientifique Dating: 17.08.1907