It is not unusual for the eye or ear to play tricks with one but when such illusions and delusions are taken for the Spirit forms of the departed and voices of the dead instead of being recognized as some subjective phenomena brought about by a physical cause the situation takes on a grave aspect. It is this transfer of an inner reaction to an external object which constitutes practically all that is necessary to be placed in the category of “psychics,” who represent the priests and ministers of Spiritualism. Distressed relatives catch at the least word which may remotely indicate that the Spirit which they seek is in communication with them. One little sign even, which appeals to their waiting imagination, shatters all ordinary caution and they are converted. Then they begin to accept all kinds of natural events as results of Spirit intervention. This state of mind is productive of many misfortunes, including suicides by those who think they are going to happiness with loved ones beyond the pale. When in Europe in 1919 finishing an engagement interrupted by the World War I was impressed by the eagerness of grief-stricken parents for the solace of a word from the boy who had passed on and my desire for the truth was renewed with fresh vigor. I am informed that so great has the “medium” craze become in Berlin that the grief-stricken residents have spent great sums of money in the hope of discovering mediums who will “guarantee them a glimpse behind the veil.” It is with the deepest interest and concern that I have watched this great wave of Spiritualism sweep the world in recent months and realized that it has taken such a hold on persons of a neurotic temperament, especially those suffering from bereavement, that it has become a menace to health and sanity. Professor George M. Robertson, eminent psychopathologist, and Physician-Superintendent of the Royal Edinburgh Mental Hospital, made the danger of insanity resulting from strong belief in Spiritualism by neurotics the subject of a part of his annual report in 1920. He says: “Those who had sustained bereavements during the war and bore them with equanimity in the days of crowded incidents and amidst the pressure of war activities, such as Red Cross and other work, find it much harder to bear up now, although time has elapsed. Some have broken down since the war came to an end. Many, as a solace to their feelings, have taken an interest in Spiritualism. Since Dr. Charles Mercier quoted in the preface of his book ‘Spiritualism and Sir Oliver Lodge’ my warning on the danger of neurotic persons engaging in practical inquiries of a Spiritualistic nature, I have received many requests to say more on the subject. I have little to add save to reaffirm the statement then made.