BRIEF OHNE UMSCHLAG Haeckel, Walter Author: Haeckel, Walter Recipient: Waldthausen, Ellen Dating: 10.08.1917
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Waldthausen, Ellen Dating: 30.03.1917
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Waldthausen, Ellen Dating: 07.04.1917
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Waldthausen, Ellen Dating: 10.04.1917
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Waldthausen, Ellen Dating: 16.04.1917
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Waldthausen, Ellen Dating: 11.04.1917
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Waldthausen, Ellen Dating: 20.04.1918
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Waldthausen, Ellen Dating: 23.04.1917
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Waldthausen, Ellen Dating: 30.04.1917
BRIEF MIT UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Waldthausen, Ellen Dating: 15.05.1917