BRIEF OHNE UMSCHLAG Mulder, Lodewijk Author: Mulder, Lodewijk Recipient: Haeckel, Ernst Dating: 19.05.1857
BRIEF OHNE UMSCHLAG Mulder, Lodewijk Author: Mulder, Lodewijk Recipient: Haeckel, Ernst Dating: 25.10.1857
BRIEF OHNE UMSCHLAG Mulder, Lodewijk Author: Mulder, Lodewijk Recipient: Haeckel, Ernst Dating: 10.06.1858
BRIEF OHNE UMSCHLAG Mulder, Lodewijk Author: Mulder, Lodewijk Recipient: Haeckel, Ernst Dating: 11.12.1858
BRIEF OHNE UMSCHLAG Engelmann, Theodor Wilhelm Author: Engelmann, Theodor Wilhelm Recipient: Haeckel, Ernst Dating: 25.12.1888
BRIEF OHNE UMSCHLAG Engelmann, Theodor Wilhelm Author: Engelmann, Theodor Wilhelm Recipient: Haeckel, Ernst Dating: 03.10.1890
BRIEF OHNE UMSCHLAG Engelmann, Emma Author: Engelmann, Emma Recipient: Haeckel, Ernst Dating: 03.10.1890
BRIEF OHNE UMSCHLAG Engelmann, Theodor Wilhelm Author: Engelmann, Theodor Wilhelm Recipient: Haeckel, Ernst Dating: 08.10.1890
BRIEF OHNE UMSCHLAG Engelmann, Emma Author: Engelmann, Emma Recipient: Haeckel, Ernst Dating: 09.10.1890
BRIEF OHNE UMSCHLAG Engelmann, Emma Author: Engelmann, Emma Recipient: Haeckel, Ernst Dating: 17.10.1890