BRIEF [O.A.] Dreyer, Friedrich Author: Dreyer, Friedrich Recipient: Eggeling, Heinrich von Dating: 08.05.1886
BRIEFENTWURF Haeckel, Ernst Author: Haeckel, Ernst Recipient: Eggeling, Heinrich von Dating: 30.12.1886
BRIEFENTWURF Haeckel, Ernst Author: Haeckel, Ernst Recipient: Eggeling, Heinrich von Dating: 03.05.1886
BRIEFENTWURF Haeckel, Ernst Author: Haeckel, Ernst Recipient: Eggeling, Heinrich von Dating: 30.05.1886
BRIEFENTWURF Haeckel, Ernst Author: Haeckel, Ernst Recipient: Eggeling, Heinrich von Dating: 31.05.1886
BRIEFABSCHRIFT Haeckel, Ernst Author: Haeckel, Ernst Recipient: Eggeling, Heinrich von Dating: 03.05.1886
BRIEFABSCHRIFT Haeckel, Ernst Author: Haeckel, Ernst Recipient: Eggeling, Heinrich von Dating: 30.12.1886