Lankester’s essay Degeneration: a chapter in Darwinism had been announced in the Athenæum, 17 April 1880, p. 502; the text had first been delivered at a general meeting of the British Association for the Advancement of Science in Sheffield in August 1879 (Lankester 1880, p. 1; Report of the 49th meeting of the British Association for the Advancement of Science, held at Sheffield (1879): lxxxvi).
Requests a copy of Ray Lankester’s lecture or essay on degeneration (Lankester, E. Ray. 1880. Degeneration: A chapter in Darwinism. London: Macmillan.).