BRIEF [O.A.] Abayawira, Don David Author: Abayawira, Don David Recipient: Haeckel, Ernst Dating: 23.09.1883
BRIEF [O.A.] Abayawira, Don David Author: Abayawira, Don David Recipient: Haeckel, Ernst Dating: 19.02.1883
BRIEF [O.A.] Hangakoon, J... H... Author: Hangakoon, J... H... Recipient: Haeckel, Ernst Dating: 18.06.1883
BRIEF [O.A.] Hangakoon, J... H... Author: Hangakoon, J... H... Recipient: Haeckel, Ernst Dating: 27.08.1883