[Sir Arthur Keith] "considered the human brain to be so special that only a very long period of slow evolution could have fashioned it from a more a more primitive state. As mentioned earlier, his obsession with the idea led him erroneously to accept two modern skeletons, Galley Hill Man and Ipswich Man, as being of ancient origin. When Piltdown Man Came along, once more it seemed to offer evidence in support of his cherished theory.
'By 1912, Keith was definitely looking for evidence in this regard, and was obviously ready to suspend much critical judgment on almost any fossil which gave more weight to his idea.'"
Roger Lewin (noted science journalist), Bones of Contention (New York, NY: A Touchstone Book published by Simon & Schuster Inc., 1987), p. 28 citing "Myths and Methods in Anatomy," Journal of the Royal College of Surgeons of Edinburgh, vol. II, no. 2, pp. 87-114 (1966), p. 71 citing "A Framework of Plausibility for an Anthropological Forgery," Anthropology, vol. 3, p. 51 (1979)