Charles Darwin declared in Descent of Man:<ref>Charles Darwin, The Descent of Man (London: John Murray, 1901), pp. 241-42 (footnote * is a reference to Anthropological Review, April, 1867, p. 236) http://www.literature.org/authors/darwin-charles/the-descent-of-man/chapter-06.html</ref> | Charles Darwin declared in Descent of Man:<ref>Charles Darwin, The Descent of Man (London: John Murray, 1901), pp. 241-42 (footnote * is a reference to Anthropological Review, April, 1867, p. 236) http://www.literature.org/authors/darwin-charles/the-descent-of-man/chapter-06.html</ref> |