BRIEF [O.A.] Frankfurter, Otto Author: Frankfurter, Otto Recipient: Haeckel, Ernst Dating: 21.01.1895
BRIEF [O.A.] Gurlitt, Fritz Author: Gurlitt, Fritz Recipient: Haeckel, Ernst Corporation: Kunsthandlung und Permanente Kunstausstellung Dating: 28.01.1895
BRIEF [O.A.] Giannini, P... de Donato Author: Giannini, P... de Donato Recipient: Haeckel, Ernst Corporation: R. Istituto Tecnico e Nautico Dating: 26.02.1895
BRIEF [O.A.] Gilchrist, John Dow Fisher Author: Gilchrist, John Dow Fisher Recipient: Haeckel, Ernst Dating: 05.09.1895