BRIEF MIT UMSCHLAG Rossipal, Karl Author: Rossipal, Karl Recipient: Schmidt, Heinrich Dating: 26.04.1921
BRIEF [O.A.] Unbekannt Author: Unbekannt Recipient: Haeckel, Walter Corporation: Wilhelm Engelmann Verlagsbuchhandlung Dating: 10.02.1921
BRIEF [O.A.] Melliess, W... Author: Melliess, W... Recipient: Haeckel, Walter Corporation: Bibliographisches Institut Dating: 18.02.1921
BRIEF [O.A.] Study, E... Author: Study, E... Recipient: Schmidt, Heinrich [vermutl.] Dating: 02.11.1921