BRIEF [O.A.] Foullon, Clementine Author: Foullon, Clementine Recipient: Haeckel, Ernst Dating: 06.05.1878
BRIEF [O.A.] Foullon, Clementine Author: Foullon, Clementine Recipient: Haeckel, Ernst Dating: 22.07.1878
BRIEF [O.A.] Foullon, Clementine Author: Foullon, Clementine Recipient: Haeckel, Ernst Dating: 29.07.1878
BRIEF [O.A.] Foullon, Clementine Author: Foullon, Clementine Recipient: Haeckel, Ernst Dating: 26.03.1878
BRIEF [O.A.] Foullon, Clementine Author: Foullon, Clementine Recipient: Haeckel, Ernst Dating: 04.04.1898