BRIEF OHNE UMSCHLAG Merkel, August Author: Merkel, August Recipient: Haeckel, Ernst Dating: 28.12.1857
BRIEF OHNE UMSCHLAG Merkel, Carl August Author: Merkel, Carl August Recipient: Haeckel, Ernst Dating: 22.07.1862
BRIEF OHNE UMSCHLAG Merkel, August Author: Merkel, August Recipient: Haeckel, Charlotte Dating: 28.06.1863
BRIEF OHNE UMSCHLAG Merkel, August Author: Merkel, August Recipient: Haeckel, Ernst Dating: 11.11.1864
BRIEF OHNE UMSCHLAG Merkel, Christiane Author: Merkel, Christiane Recipient: Haeckel, Ernst Dating: 03.07.1867
BRIEF OHNE UMSCHLAG Merkel, August Author: Merkel, August Recipient: Haeckel, Ernst Dating: 28.06.1863
BRIEF OHNE UMSCHLAG Hetzer, Wilhelm Author: Hetzer, Wilhelm Recipient: Haeckel, Ernst Dating: 24.07.1852
BRIEF OHNE UMSCHLAG Richter, Wilhelm Author: Richter, Wilhelm Recipient: Haeckel, Ernst Dating: 30.06.1886
BRIEF OHNE UMSCHLAG Hetzer, Wilhelm Author: Hetzer, Wilhelm Recipient: Haeckel, Ernst Dating: 12.01.1853
