BRIEF [O.A.] Cunningham, D. J. Author: Cunningham, D. J. Recipient: Haeckel, Ernst Dating: 27.08.1881
BRIEF [O.A.] Bell, Francis Jeffrey Author: Bell, Francis Jeffrey Recipient: Haeckel, Ernst Corporation: British Museum (Natural History) Dating: 02.07.1881
BRIEF OHNE UMSCHLAG Aveling, Edward Bibbins Author: Aveling, Edward Bibbins Recipient: Haeckel, Ernst Corporation: Practical Science Laboratory Dating: 01.11.1881
BRIEF OHNE UMSCHLAG Lankester, Edwin Ray Author: Lankester, Edwin Ray Recipient: Haeckel, Ernst Corporation: University of London Dating: 24.07.1881