BRIEF OHNE UMSCHLAG Lachmann, Johannes Author: Lachmann, Johannes Recipient: Haeckel, Ernst Dating: 15.11.1857
BRIEF OHNE UMSCHLAG Mulder, Lodewijk Author: Mulder, Lodewijk Recipient: Haeckel, Ernst Dating: 29.09.1857
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 Merkel, August Author: Merkel, August Recipient: Haeckel, Ernst Dating: 28.12.1857
BRIEF OHNE UMSCHLAG Haeckel, Karl; Haeckel, Hermine Author: Haeckel, Karl; Haeckel, Hermine Recipient: Haeckel, Ernst Dating: 06.05.1857
BRIEF OHNE UMSCHLAG Sethe, Anna Author: Sethe, Anna Recipient: Haeckel, Charlotte; Haeckel, Ernst Dating: 19.03.1857
BRIEF OHNE UMSCHLAG Haeckel, Carl Gottlob Author: Haeckel, Carl Gottlob Recipient: Haeckel, Ernst Dating: 06.07.1857