BRIEF [O.A.] Meyer, Elisabeth Author: Meyer, Elisabeth Recipient: Haeckel, Ernst; Haeckel, Agnes [Eltern] Dating: 16.03.1900
BRIEF [O.A.] Meyer, Elisabeth Author: Meyer, Elisabeth Recipient: Haeckel, Ernst; Haeckel, Agnes [Eltern] Dating: 15.06.1899
BRIEF [O.A.] Meyer, Elisabeth Author: Meyer, Elisabeth Recipient: Haeckel, Ernst; Haeckel, Agnes [Eltern] Dating: 26.03.1892
BRIEF [O.A.] Meyer, Elisabeth Author: Meyer, Elisabeth Recipient: Haeckel, Ernst; Haeckel, Agnes [Eltern] Dating: 23.09.1892
BRIEF [O.A.] Meyer, Elisabeth Author: Meyer, Elisabeth Recipient: Haeckel, Ernst; Haeckel, Agnes [Eltern] Dating: 17.10.1898
BRIEF [O.A.] Meyer, Elisabeth Author: Meyer, Elisabeth Recipient: Haeckel, Ernst; Haeckel, Agnes [Eltern] Dating: 03.03.1912