BRIEF OHNE UMSCHLAG Godeffroy, Cesar Author: Godeffroy, Cesar Recipient: Haeckel, Ernst Dating: 28.02.1881
BRIEF [O.A.] Schmeltz, J... D... C... Author: Schmeltz, J... D... C... Recipient: Haeckel, Ernst Corporation: Museum Godeffroy Dating: 24.03.1881
BRIEF [O.A.] Schmeltz, J... D... C... Author: Schmeltz, J... D... C... Recipient: Haeckel, Ernst Corporation: Museum Godeffroy Dating: 01.03.1881