Their existence is so well established historically that, as a general thing, they are no longer disputed by unbelievers, who now seek only to explain them naturally. Thus a free-thinking physician, Dr. Dumas, professor of religious psychology at the Sorbonne, clearly admits the facts (Revue des Deux Mondes, 1 May, 1907), as does also Dr. Pierre Janet (Bulletin de l'Institut psychologique international, Paris, July, 1901).
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