POSTKARTE Vayssiere, A... Author: Vayssiere, A... Recipient: Haeckel, Ernst Corporation: Faculté des Sciences de Marseille, Chaire der Zoologie Agricole Dating: 19.02.1914
BRIEF [O.A.] Vayssiere, A... Author: Vayssiere, A... Recipient: Haeckel, Ernst Corporation: Université D Aix-Marseille Dating: 28.07.1910
BRIEF [O.A.] Zromelin, Cte. de Author: Zromelin, Cte. de Recipient: Haeckel, Ernst Dating: 28.04.1909
ANSICHTSKARTE Rottenburg, Paul von Author: Rottenburg, Paul von Recipient: Haeckel, Ernst Dating: 08.01.1904
ANSICHTSKARTE Rottenburg, Paul von Author: Rottenburg, Paul von Recipient: Haeckel, Ernst Dating: 10.01.1902