BRIEF OHNE UMSCHLAG Murray, John Author: Murray, John Recipient: Haeckel, Ernst Corporation: Challenger Office Dating: 12.03.1881
BRIEF OHNE UMSCHLAG Murray, John Author: Murray, John Recipient: Haeckel, Ernst Corporation: Challenger Office Dating: 12.11.1880
BRIEF OHNE UMSCHLAG Murray, John Author: Murray, John Recipient: Haeckel, Ernst Corporation: Challenger Office Dating: 11.05.1881
BRIEF OHNE UMSCHLAG Murray, John Author: Murray, John Recipient: Haeckel, Ernst Corporation: Challenger Expedition Office Dating: 12.06.1883
BRIEF OHNE UMSCHLAG Hoyle, William Evans Author: Hoyle, William Evans Recipient: Haeckel, Ernst Corporation: Challenger Expedition Office Dating: 27.11.1884
BRIEF OHNE UMSCHLAG Hoyle, William Evans Author: Hoyle, William Evans Recipient: Haeckel, Ernst Corporation: Challenger Expedition Office Dating: 28.11.1884
POSTKARTE Hoyle, William Evans Author: Hoyle, William Evans Recipient: Haeckel, Ernst Corporation: Challenger Expedition Office Dating: 11.10.1884