BRIEF [O.A.] Bennett, Alexander Author: Bennett, Alexander Recipient: Haeckel, Ernst Dating: 04.02.1907
BRIEF [O.A.] Biddlecombe, A... Author: Biddlecombe, A... Recipient: Haeckel, Ernst Dating: 30.09.1907
BRIEF OHNE UMSCHLAG Watts, Charles A. Author: Watts, Charles A. Recipient: Haeckel, Ernst Corporation: The Rationalist Press Association, Limited Dating: 24.07.1907
BRIEF OHNE UMSCHLAG Watts, Charles A. Author: Watts, Charles A. Recipient: Haeckel, Ernst Corporation: The Rationalist Press Association, Limited Dating: 26.08.1907
BRIEF [O.A.] Bather, Francis Arthur Author: Bather, Francis Arthur Recipient: Haeckel, Ernst Corporation: British Museum (Natural History) Dating: 30.12.1907
BRIEF [O.A.] Davis, J... R... Ainsworth Author: Davis, J... R... Ainsworth Recipient: Haeckel, Ernst Corporation: University College of Wales Dating: 25.02.1907