BRIEF [O.A.] Kellner, Heinrich Author: Kellner, Heinrich Recipient: Haeckel, Ernst Dating: 22.07.1908
BRIEF [O.A.] Deys, P... Author: Deys, P... Recipient: Haeckel, Ernst Corporation: Masonic Journal Dating: 18.05.1911
BRIEF OHNE UMSCHLAG Bleek, Wilhelm Heinrich Immanuel Author: Bleek, Wilhelm Heinrich Immanuel Recipient: Haeckel, Ernst Dating: 12.03.1867
BRIEF OHNE UMSCHLAG Bleek, Wilhelm Heinrich Immanuel Author: Bleek, Wilhelm Heinrich Immanuel Recipient: Haeckel, Ernst Dating: 18.10.1867
BRIEF OHNE UMSCHLAG Bleek, Wilhelm Heinrich Immanuel Author: Bleek, Wilhelm Heinrich Immanuel Recipient: Haeckel, Ernst Dating: 19.11.1867
BRIEF OHNE UMSCHLAG Bleek, Wilhelm Heinrich Immanuel Author: Bleek, Wilhelm Heinrich Immanuel Recipient: Haeckel, Ernst Dating: 18.12.1867
BRIEF MIT UMSCHLAG Bleek, Wilhelm Author: Bleek, Wilhelm Recipient: Haeckel, Ernst Dating: 18.03.1868