BRIEF [O.A.] Edwards, Robert Welch Author: Edwards, Robert Welch Recipient: Haeckel, Ernst Dating: 08.01.1867
BRIEF [O.A.] Focke, Gustav Waldemar Author: Focke, Gustav Waldemar Recipient: Haeckel, Ernst Dating: 29.10.1867
BRIEF [O.A.] Focke, Gustav Waldemar Author: Focke, Gustav Waldemar Recipient: Haeckel, Ernst Dating: 23.11.1867
BRIEF [O.A.] Dohrn, Carl August Author: Dohrn, Carl August Recipient: Haeckel, Ernst Dating: 28.06.1867
BRIEF [O.A.] Göttling, Carl Wilhelm Author: Göttling, Carl Wilhelm Recipient: Haeckel, Ernst Dating: 09.08.1867
