BRIEF [O.A.] Abayawira, M. P. Abraham Author: Abayawira, M. P. Abraham Recipient: Haeckel, Ernst Dating: 10.01.1886
BRIEF [O.A.] Abayawira, Don David Author: Abayawira, Don David Recipient: Haeckel, Ernst Dating: 05.06.1886
BRIEF [O.A.] Abayawira, Don David Author: Abayawira, Don David Recipient: Haeckel, Ernst Dating: 25.09.1886