BRIEF OHNE UMSCHLAG Hold, Alexander Freiherr von Author: Hold, Alexander Freiherr von Recipient: Haeckel, Ernst Dating: 05.05.1900
BRIEF OHNE UMSCHLAG Müller, Arthur Author: Müller, Arthur Recipient: Haeckel, Ernst Dating: 07.02.1900
BRIEF OHNE UMSCHLAG Kraigher-Porges, Josepha Author: Kraigher-Porges, Josepha Recipient: Haeckel, Ernst Dating: 31.05.1900
BRIEF OHNE UMSCHLAG Kraigher-Porges, Josepha Author: Kraigher-Porges, Josepha Recipient: Haeckel, Ernst Dating: 30.07.1900
BRIEF OHNE UMSCHLAG Grazie, Marie Eugenie delle Author: Grazie, Marie Eugenie delle Recipient: Haeckel, Ernst Dating: 25.05.1900
ANSICHTSKARTE Grazie, Marie Eugenie delle; Müllner, Laurenz Author: Grazie, Marie Eugenie delle; Müllner, Laurenz Recipient: Haeckel, Ernst Dating: 20.07.1900
ANSICHTSKARTE Grazie, Marie Eugenie delle; Müllner, Laurenz Author: Grazie, Marie Eugenie delle; Müllner, Laurenz Recipient: Haeckel, Ernst Dating: 08.08.1900