BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Möbius, Karl August Dating: 12.11.1887
BRIEF [O.A.] Haeckel, Ernst Author: Haeckel, Ernst Recipient: Haeckel, Charlotte [Mutter] Dating: 16.04.1887
BRIEF [O.A.] Haeckel, Ernst Author: Haeckel, Ernst Recipient: Haeckel, Charlotte [Mutter] Dating: 16.07.1887
BRIEF [O.A.] Haeckel, Ernst Author: Haeckel, Ernst Recipient: Haeckel, Charlotte [Mutter] Dating: 30.03.1887
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Jensen, Wilhelm Dating: 08.07.1887
BRIEF [O.A.] Haeckel, Ernst Author: Haeckel, Ernst Recipient: Radowitz, Joseph Maria von Dating: 25.03.1887
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Hartmann, Martin Dating: 27.02.1887
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Eucken, Rudolf Dating: 12.02.1887
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Eucken, Rudolf Dating: 12.02.1887