POSTKARTE Hoyle, William Evans Author: Hoyle, William Evans Recipient: Haeckel, Ernst Dating: 28.10.1886
BRIEF OHNE UMSCHLAG Lendenfeld, Robert von Author: Lendenfeld, Robert von Recipient: Haeckel, Ernst Dating: 09.06.1886
BRIEF OHNE UMSCHLAG Murray, John Author: Murray, John Recipient: Haeckel, Ernst Corporation: Challenger Expedition Office Dating: 23.11.1886
POSTKARTE Rattray, John Author: Rattray, John Recipient: Haeckel, Ernst Corporation: Challenger-Office Dating: 09.09.1886
BRIEF OHNE UMSCHLAG Anderson, Alexander Author: Anderson, Alexander Recipient: Haeckel, Ernst Corporation: Philosophical Institution Dating: 04.05.1886
BRIEF OHNE UMSCHLAG Murray, John Author: Murray, John Recipient: Haeckel, Ernst Corporation: Challenger Office Dating: 08.10.1886
BRIEF OHNE UMSCHLAG Murray, John Author: Murray, John Recipient: Haeckel, Ernst Corporation: Challenger Office Dating: 29.11.1886
BRIEF OHNE UMSCHLAG Murray, John Author: Murray, John Recipient: Haeckel, Ernst Corporation: Challenger Office Dating: 26.07.1886
BRIEF OHNE UMSCHLAG Murray, John Author: Murray, John Recipient: Haeckel, Ernst Corporation: Challenger Office Dating: 15.07.1886