BRIEF OHNE UMSCHLAG Obkircher, Arnold Author: Obkircher, Arnold Recipient: Haeckel, Ernst Dating: 12.04.1906
BRIEF OHNE UMSCHLAG Dodel-Port, Arnold Author: Dodel-Port, Arnold Recipient: Haeckel, Ernst Dating: 20.06.1906
BRIEF OHNE UMSCHLAG Treub, Melchior Author: Treub, Melchior Recipient: Haeckel, Ernst Dating: 10.04.1906
BRIEF OHNE UMSCHLAG Schulz, Konrad Author: Schulz, Konrad Recipient: Haeckel, Ernst Dating: 23.03.1906
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Delle Grazie, Marie Eugenie Dating: 26.09.1906
BRIEF OHNE UMSCHLAG Krupp, Margarethe Author: Krupp, Margarethe Recipient: Haeckel, Ernst Dating: 24.01.1906
BRIEF OHNE UMSCHLAG Weber, Johannes Author: Weber, Johannes Recipient: Haeckel, Ernst Dating: 30.12.1906
