William Kingdon Clifford (1884). “The Scientific Basis of Morals: And Other Essays, Viz. : Right and Wrong, the Ethics of Belief, the Ethics of Religion”
Richard Dawkins' Speech at the Edinburgh International Science Festival (April 15, 1992); quoted in "EDITORIAL: A scientist's case against God", "The Independent"(London), (p. 17), April 20, 1992.