For anyone who will have the patience to study the published resultsof psychic investigation during the last fifty years, the reality ofclairvoyance as an occasional phenomenon of human intelligence mustestablish itself on an immovable foundation. For those who, withoutbeing occultists--students that is to say of Nature's loftier aspects,in a position to obtain better teaching than that which any writtenbooks can give--for those who merely avail themselves of recordedevidence, a declaration on the part of others of a disbelief in thepossibility of clairvoyance, is on a level with the proverbialAfrican's disbelief in ice. But the experiences of clairvoyance thathave accumulated on the hands of those who have studied it inconnection with mesmerism, do no more than prove the existence inhuman nature of a capacity for cognizing physical phenomena distanteither in space or time, in some way which has nothing to do with thephysical senses. Those who have studied the mysteries of clairvoyancein connection with theosophic teaching have been enabled to realizethat the ultimate resources of that faculty range as far beyond itshumbler manifestations, dealt with by unassisted enquirers, as theresources of the higher mathematics exceed those of the abacus.Clairvoyance, indeed, is of many kinds, all of which fall easily intotheir places when we appreciate the manner in which humanconsciousness functions on different planes of Nature. The faculty ofreading the pages of a closed book, or of discerning objectsblindfold, or at a distance from the observer, is quite a differentfaculty from that employed on the cognition of past events. That lastis the kind of which it is necessary to say something here, in orderthat the true character of the present treatise on Atlantis may beunderstood, but I allude to the others merely that the explanation Ihave to give may not be mistaken for a complete theory of clairvoyancein all its varieties.