BRIEF [O.A.] Bouret, Ch... Author: Bouret, Ch... Recipient: Haeckel, Ernst Corporation: Libería Espanola de la Vda de Ch. Bouret Dating: 09.10.1902
BRIEF [O.A.] Bollack, Leon Author: Bollack, Leon Recipient: Haeckel, Ernst Corporation: La Langue Bleue Dating: 20.03.1902
BRIEF [O.A.] Grandsagne, Ajasson de Author: Grandsagne, Ajasson de Recipient: Haeckel, Ernst Corporation: Moniteur Général Dating: 02.02.1902