BRIEF [O.A.] Fewkes, J... Walter Author: Fewkes, J... Walter Recipient: Haeckel, Ernst Dating: 22.01.1888
BRIEF OHNE UMSCHLAG Engelmann, Theodor Wilhelm Author: Engelmann, Theodor Wilhelm Recipient: Haeckel, Ernst Dating: 14.07.1888
BRIEF [O.A.] Engelmann, Emma; Engelmann, Theodor Wilhelm Author: Engelmann, Emma; Engelmann, Theodor Wilhelm Recipient: Haeckel, Ernst Dating: 31.07.1888
BRIEF OHNE UMSCHLAG Engelmann, Theodor Wilhelm Author: Engelmann, Theodor Wilhelm Recipient: Haeckel, Ernst Dating: 25.12.1888
BRIEF OHNE UMSCHLAG Erdmann, Gustav Adolf Author: Erdmann, Gustav Adolf Recipient: Haeckel, Ernst Dating: 06.05.1888
BRIEF OHNE UMSCHLAG Erdmann, Gustav Adolf Author: Erdmann, Gustav Adolf Recipient: Haeckel, Ernst Dating: 10.05.1888
BRIEF OHNE UMSCHLAG Engelmann, Theodor Wilhelm Author: Engelmann, Theodor Wilhelm Recipient: Haeckel, Ernst Corporation: Wilhelm Engelmann, Verlagsbuchhandlung Dating: 29.03.1888