POSTKARTE Meyer, Elisabeth Author: Meyer, Elisabeth Recipient: Haeckel, Agnes; Haeckel, Ernst Dating: 18.08.1910
BRIEF OHNE UMSCHLAG Meyer, Elisabeth Author: Meyer, Elisabeth Recipient: Haeckel, Ernst Dating: 24.08.1917
BRIEF OHNE UMSCHLAG Meyer, Elisabeth Author: Meyer, Elisabeth Recipient: Haeckel, Ernst Dating: 14.01.1919
BRIEF OHNE UMSCHLAG Meyer, Elisabeth Author: Meyer, Elisabeth Recipient: Haeckel, Ernst Dating: 13.10.1903