After twenty-two years of nightmare and terror, saved only by a desperate conviction of the mythical source of certain impressions, I am unwilling to vouch for the truth of that which I think I found in Western Australia on the night of 17-18 July 1935. There is reason to hope that my experience was wholly or partly an hallucination - for which, indeed, abundant causes existed. And yet, its realism was so hideous that I sometimes find hope impossible.

If the thing did happen, then man must be prepared to accept notions of the cosmos, and of his own place in the seething vortex of time, whose merest mention is paralysing. He must, too, be placed on guard against a specific, lurking peril which, though it will never engulf the whole race, may impose monstrous and unguessable horrors upon certain venturesome members of it.

It is for this latter reason that I urge, with all the force of my being, final abandonment of all the attempts at unearthing those fragments of unknown, primordial masonry which my expedition set out to investigate.

Assuming that I was sane and awake, my experience on that night was such as has befallen no man before. It was, moreover, a frightful confirmation of all I had sought to dismiss as myth and dream. Mercifully there is no proof, for in my fright I lost the awesome object which would - if real and brought out of that noxious abyss - have formed irrefutable evidence.

When I came upon the horror I was alone - and I have up to now told no one about it. I could not stop the others from digging in its direction, but chance and the shifting sand have so far saved them from finding it. Now I must formulate some definite statement - not only for the sake of my own mental balance, but to warn such others as may read it seriously.

These pages - much in whose earlier parts will be familiar to close readers of the general and scientific press - are written in the cabin of the ship that is bringing me home. I shall give them to my son, Professor Wingate Peaslee of Miskatonic University - the only member of my family who stuck to me after my queer amnesia of long ago, and the man best informed on the inner facts of my case. Of all living persons, he is least likely to ridicule what I shall tell of that fateful night.

I did not enlighten him orally before sailing, because I think he had better have the revelation in written form. Reading and re-reading at leisure will leave with him a more convincing picture than my confused tongue could hope to convey.

He can do anything that he thinks best with this account - showing it, with suitable comment, in any quarters where it will be likely to accomplish good. It is for the sake of such readers as are unfamiliar with the earlier phases of my case that I am prefacing the revelation itself with a fairly ample summary of its background.

My name is Nathaniel Wingate Peaslee, and those who recall the newspaper tales of a generation back - or the letters and articles in psychological journals six or seven years ago - will know who and what I am. The press was filled with the details of my strange amnesia in 1908-13, and much was made of the traditions of horror, madness, and witchcraft which lurked behind the ancient Massachusetts town then and now forming my place of residence. Yet I would have it known that there is nothing whatever of the mad or sinister in my heredity and early life. This is a highly important fact in view of the shadow which fell so suddenly upon me from outside sources.

It may be that centuries of dark brooding had given to crumbling, whisper-haunted Arkham a peculiar vulnerability as regards such shadows - though even this seems doubtful in the light of those other cases which I later came to study. But the chief point is that my own ancestry and background are altogether normal. What came, came from somewhere else - where I even now hesitate to assert in plain words.

I am the son of Jonathan and Hannah (Wingate) Peaslee, both of wholesome old Haverhill stock. I was born and reared in Haverhill - at the old homestead in Boardman Street near Golden Hill - and did not go to Arkham till I entered Miskatonic University as instructor of political economy in 1895.

For thirteen years more my life ran smoothly and happily. I married Alice Keezar of Haverhill in 1896, and my three children, Robert, Wingate and Hannah were born in 1898, 1900, and 1903, respectively. In 1898 I became an associate professor, and in 1902 a full professor. At no time had I the least interest in either occultism or abnormal psychology.

It was on Thursday, 14 May 1908, that the queer amnesia came. The thing was quite sudden, though later I realized that certain brief, glimmering visions of several, hours previous - chaotic visions which disturbed me greatly because they were so unprecedented - must have formed premonitory symptoms. My head was aching, and I had a singular feeling - altogether new to me - that some one else was trying to get possession of my thoughts.

The collapse occurred about 10.20 A.M., while I was conducting a class in Political Economy VI - history and present tendencies of economics - for juniors and a few sophomores. I began to see strange shapes before my eyes, and to feel that I was in a grotesque room other than the classroom.

My thoughts and speech wandered from my subject, and the students saw that something was gravely amiss. Then I slumped down, unconscious, in my chair, in a stupor from which no one could arouse me. Nor did my rightful faculties again look out upon the daylight of our normal world for five years, four months, and thirteen days.

It is, of course, from others that I have learned what followed. I showed no sign of consciousness for sixteen and a half hours though removed to my home at 27 Crane Street, and given the best of medical attention.

At 3 A.M. May my eyes opened and began to speak and my family were thoroughly frightened by the trend of my expression and language. It was clear that I had no remembrance of my identity and my past, though for some reason seemed anxious to conceal his lack of knowledge. My eyes glazed strangely at the persons around me, and the flections of my facial muscles were altogether unfamiliar.

Even my speech seemed awkward and foreign. I used my vocal organs clumsily and gropingly, and my diction had a curiously stilted quality, as if I had laboriously learned the English language from books. The pronunciation was barbarously alien, whilst the idiom seemed to include both scraps of curious archaism and expressions of a wholly incomprehensible cast.

Of the latter, one in particular was very potently - even terrifiedly - recalled by the youngest of the physicians twenty years afterward. For at that late period such a phrase began to have an actual currency - first in England and then in the United States - and though of much complexity and indisputable newness, it reproduced in every least particular the mystifying words of the strange Arkham patient of 1908.

Physical strength returned at once, although I required an odd amount of re-education in the use of my hands, legs, and bodily apparatus in general. Because of this and other handicaps inherent in the mnemonic lapse, I was for some time kept under strict medical care.

When I saw that my attempts to conceal the lapse had failed, I admitted it openly, and became eager for information of all sorts. Indeed, it seemed to the doctors that I lost interest in my proper personality as soon as I found the case of amnesia accepted as a natural thing.

They noticed that my chief efforts were to master certain points in history, science, art, language, and folklore - some of them tremendously abstruse, and some childishly simple - which remained, very oddly in many cases, outside my consciousness.

At the same time they noticed that I had an inexplicable command of many almost unknown sorts of knowledge - a command which I seemed to wish to hide rather than display. I would inadvertently refer, with casual assurance, to specific events in dim ages outside of the range of accepted history - passing off such references as a jest when I saw the surprise they created. And I had a way of speaking of the future which two or three times caused actual fright.

These uncanny flashes soon ceased to appear, though some observers laid their vanishment more to a certain furtive caution on my part than to any waning of the strange knowledge behind them. Indeed, I seemed anomalously avid to absorb the speech, customs, and perspectives of the age around me; as if I were a studious traveller from a far, foreign land.

As soon as permitted, I haunted the college library at all hours; and shortly began to arrange for those odd travels, and special courses at American and European Universities, which evoked so much comment during the next few years.

I did not at any time suffer from a lack of learned contacts, for my case had a mild celebrity among the psychologists of the period. I was lectured upon as a typical example of secondary personality - even though I seemed to puzzle the lecturers now and then with some bizarre symptoms or some queer trace of carefully veiled mockery.

Of real friendliness, however, I encountered little. Something in my aspect and speech seemed to excite vague fears and aversions in every one I met, as if I were a being infinitely removed from all that is normal and healthful. This idea of a black, hidden horror connected with incalculable gulfs of some sort of distance was oddly widespread and persistent.

My own family formed no exception. From the moment of my strange waking my wife had regarded me with extreme horror and loathing, vowing that I was some utter alien usurping the body of her husband. In 1910 she obtained a legal divorce, nor would she ever consent to see me even after my return to normality in 1913. These feelings were shared by my elder son and my small daughter, neither of whom I have ever seen since.

Only my second son, Wingate, seemed able to conquer the terror and repulsion which my change aroused. He indeed felt that I was a stranger, but though only eight years old held fast to a faith that my proper self would return. When it did return he sought me out, and the courts gave me his custody. In succeeding years he helped me with the studies to which I was driven, and today, at thirty-five, he is a professor of psychology at Miskatonic.

But I do not wonder at the horror caused - for certainly, the mind, voice, and facial expression of the being that awakened on l5 May 1908, were not those of Nathaniel Wingate Peaslee.

I will not attempt to tell much of my life from 1908 to 1913, since readers may glean the outward essentials - as I largely had to do - from files of old newspapers and scientific journals.

I was given charge of my funds, and spent them slowly and on the whole wisely, in travel and in study at various centres of learning. My travels, however, were singular in the extreme, involving long visits to remote and desolate places.

In 1909 I spent a month in the Himalayas, and in 1911 roused much attention through a camel trip into the unknown deserts of Arabia. What happened on those journeys I have never been able to learn.

During the summer of l9l2 I chartered a ship and sailed in the Arctic, north of Spitzbergen, afterward showing signs of disappointment.

Later in that year I spent weeks - alone beyond the limits of previous or subsequent exploration in the vast limestone cavern systems of western Virginia - black labyrinths so complex that no retracing of my steps could even be considered.

My sojourns at the universities were marked by abnormally rapid assimilation, as if the secondary personality had an intelligence enormously superior to my own. I have found, also, that my rate of reading and solitary study was phenomenal. I could master every detail of a book merely by glancing over it as fast as I could turn the leaves; while my skill at interpreting complex figures in an instant was veritably awesome.

At times there appeared almost ugly reports of my power to influence the thoughts and acts of others, though I seemed to have taken care to minimize displays of this faculty.

Other ugly reports concerned my intimacy with leaders of occultist groups, and scholars suspected of connection with nameless bands of abhorrent elder-world hierophants. These rumours, though never proved at the time, were doubtless stimulated by the known tenor of some of my reading - for the consultation of rare books at libraries cannot be effected secretly.

There is tangible proof - in the form of marginal notes - that I went minutely through such things as the Comte d'Erlette's Cultes des Goules, Ludvig Prinn's De Vermis Mysteriis, the Unaussprechlichen Kulten of von Junzt, the surviving fragments of the puzzling Book of Eibon, and the dreaded Necronomicon of the mad Arab Abdul Alhazred. Then, too, it is undeniable that a fresh and evil wave of underground cult activity set in about the time of my odd mutation.

In the summer of 1913 I began to display signs of ennui and flagging interest, and to hint to various associates that a change might soon be expected in me. I spoke of returning memories of my earlier life - though most auditors judged me insincere, since all the recollections I gave were casual, and such as might have been learned from my old private papers.

About the middle of August I returned to Arkham and re-opened my long-closed house in Crane Street. Here I installed a mechanism of the most curious aspect, constructed piecemeal by different makers of scientific apparatus in Europe and America, and guarded carefully from the sight of any one intelligent enough to analyse it.

Those who did see it - a workman, a servant, and the new housekeeper - say that it was a queer mixture of rods, wheels, and mirros, though only about two feet tall, one foot wide, and one foot thick. The central mirror was circular and convex. All this is borne out by such makers of parts as can be located.

On the evening of Friday, 26 September, I dismissed the housekeeper and the maid until noon of the next day. Lights burned in the house till late, and a lean, dark, curiously foreign-looking man called in an automobile.

It was about one A.M. that the lights were last seen. At 2.15 A.M. a policeman observed the place in darkness, but the stranger's motor still at the curb. By 4 o'clock the motor was certainly gone.

It was at 6 o'clock that a hesitant, foreign voice on the telephone asked Dr Wilson to call at my house and bring me out of a peculiar faint. This call - a long-distance one - was later traced to a public booth in the North Station in Boston, but no sign of the lean foreigner was ever unearthed.

When the doctor reached my house he found me unconscious in the sitting room - in an easy-chair with a table drawn up before it. On the polished top were scratches showing where some heavy object had rested. The queer machine was gone, nor was anything afterward heard of it. Undoubtedly the dark, lean foreigner had taken it away.

In the library grate were abundant ashes, evidently left from the burning of the every remainmg scrap of paper on which I had written since the advent of the amnesia. Dr Wilson found my breathing very peculiar, but after a hypodermic injection it became more regular.

At 11.15 A.M., 27 September, I stirred vigorously, and my hitherto masklike face began to show signs of expression. Dr Wilson remarked that the expression was not that of my secondary personality, but seemed much like that of my normal self. About 11.30 I muttered some very curious syllables - syllables which seemed unrelated to any human speech. I appeared, too, to struggle against something. Then, just afternoon - the housekeeper and the maid having meanwhile returned - I began to mutter in English.

"- of the orthodox economists of that period, Jevons typifies the prevailing trend toward scientific correlation. His attempt to link the commercial cycle of prosperity and depression with the physical cycle of the solar spots forms perhaps the apex of -"

Nathaniel Wingate Peaslee had come back - a spirit in whose time scale it was still Thursday morning in 1908, with the economics class gazing up at the battered desk on the platform.

My reabsorption into normal life was a painful and difficult process. The loss of over five years creates more complications than can be imagined, and in my case there were countless matters to be adjusted.

What I heard of my actions since 1908 astonished and disturbed me, but I tried to view the matter as philosophically as I could. At last, regaining custody of my second son, Wingate, I settled down with him in the Crane Street house and endeavoured to resume my teaching - my old professorship having been kindly offered me by the college.

I began work with the February, 1914, term, and kept at it just a year. By that time I realized how badly my experience had shaken me. Though perfectly sane - I hoped - and with no flaw in my original personality, I had not the nervous energy of the old days. Vague dreams and queer ideas continually haunted me, and when the outbreak of the World War turned my mind to history I found myself thinking of periods and events in the oddest possible fashion.

My conception of time, my ability to distinguish between consecutiveness and simultaneousness - seemed subtly disordered so that I formed chimerical notions about living in one age and casting one's mind all over etenity for knowledge of past and future ages.

The war gave me strange impressions of remembering some of its far-off consequences - as if I knew how it was coming out and could look back upon it in the light of future information. All such quasi-memories were attended with much pain, and with a feeling that some artificial psychological barrier was set a against them.

When I diffidently hinted to others about my impressions I met with varied responses. Some persons looked uncomfortably at me, but men in the mathematics department spoke of new developments in those theories of relativity - then discussed only in learned circles - which were later to become so famous. Dr. Albert Einstein, they said, was rapidly reducing time to the status of a mere dimension.

But the dreams and disturbed feelings gained on me, so that I had to drop my regular work in 1915. Certainly the impressions were taking an annoying shape - giving me the persistent notion that my amnesia had formed some unholy sort of exchange; that the secondary personality had indeed had suffered displacement. been an in-

Thus I was driven to vague and fright speculations concerning the whereabouts of my true self during the years that another had held my body. The curious knowledge and strange conduct of my body's late tenant troubled me more and more as I learned further details from persons, papers, and magazines.

Queernesses that had baffled others seemed to harmonize terribly with some background of black knowledge which festered in the chasms of my subconscious. I began to search feverishly for every scrap of information bearing on the studies and travels of that other one during the dark years.

Not all of my troubles were as semi-abstract as this. There were the dreams - and these seemed to grow in vividness and concreteness. Knowing how most would regard them, I seldom mentioned them to anyone but my son or certain trusted psychologists, but eventually I commenced a scientific study of other cases in order to see how typical or nontypical such visions might be among amnesia victims.

My results, aided by psychologists, historians, anthropologists, and mental specialists of wide experience, and by a study that included all records of split personalities from the days of daemonic-possession legends to the medically realistic present, at first bothered me more than they consoled me.

I soon found that my dreams had, indeed, no counterpart in the overwhelming bulk of true amnesia cases. There remained, however, a tiny residue of accounts which for years baffled and shocked me with their parallelism to my own experience. Some of them were bits of ancient folklore; others were case histories in the annals of medicine; one or two were anecdotes obscurely buried in standard histories.

It thus appeared that, while my special kind of affliction was prodigiously rare, instances of it had occurred at long intervals ever since the beginnig of men's annals. Some centuries might contain one, two, or three cases, others none - or at least none whose record survived.

The essence was always the same - a person of keen thoughtfulness seized a strange secondary life and leading for a greater or lesser period an utterly alien existence typified at first by vocal and bodily awkwardness, an later by a wholesale acquisition of scientific, historic, artistic, and anthropologic knowledge; an acquisition carried on with feverish zest and with a wholly abnormal absorptive power. Then a sudden return of rightful consciousness, intermittently plagued ever after with vague unplaceable dreams suggesting fragments of some hideous memory elaborately blotted out.

And the close resemblance of those nightmares to my own - even in some of the smallest particulars - left no doubt in my mind of their significantly typical nature. One or two of the cases had an added ring of faint, blasphemous familiarity, as if I had heard of them before through some cosmic channel too morbid and frightful to contemplate. In three instances there was specific mention of such an unknown machine as had been in my house before the second change.

Another thing that worried me during my investigation was the somewhat greater frequency of cases where a brief, elusive glimpse of the typical nightmares was afforded to persons not visited well-defined amnesia.

These persons were largely of mediocre mind or less - some so primitive that they could scarcely be thought of as vehicles for abnormal scholarship and preternatural mental acquisitions. For a second they would be fired with alien force - then a backward lapse, and a thin, swift-fading memory of unhuman horrors.

There had been at least three such cases during the past half century - one only fifteen years before. Had something been groping blindly through time from some unsuspected abyss in Nature? Were these faint cases monstrous, sinister experiments of a kind and authorship uttely beyond same belief?

Such were a few of the forless speculations of my weaker hours - fancies abetted by myths which my studies uncovered. For I could not doubt but that certain persistent legends of immemorial antiquity, apparently unknown to the victims and physicians connected with recent amnesia cases, formed a striking and awesome elaboration of memory lapses such as mine.

Of the nature of the dreams and impressions which were growing so clamorous I still almost fear to speak. They seemed to savor of madness, and at times I believed I was indeed going mad. Was there a special type of delusion afflicting those who had suffered lapses of memory? Conceivably, the efforts of the subconscious mind to fill up a perplexing blank with pseudo-memories might give rise to strange imaginative vagaries.

This indeed - though an alternative folklore theory finally seemed to me more plausible - was the belief of many of the alienists who helped me in my search for parallel cases, and who shared my puzzlement at the exact resemblances sometimes discovered.

They did not call the condition true insanity, but classed it rather among neurotic disorders. My course in trying to track down and analyze it, instead of vaintly seeking to dismiss or forget it, they heartily endorsed as correct according to the best psychological principles. I especially valued the advice of such physicians as had studied me during my possession by the other personality.

My first disturbances were not visual at all, but concerned the more abstract matters which I have mentioned. There was, too, a feeling of profound and inexplicable horror concerning myself. I developed a queer fear of seeing my own form, as if my eyes would find it something utterly alien and inconceivably abhorrent.

When I did glance down and behold the familiar human shape in quiet grey or blue clothing, I always felt a curious relief, though in order to gain this relief I had to conquer an infinite dread. I shunned mirrors as much as possible, and was always shaved at the barber's.

It was a long time before I correlated any of these disappointed feelings with the fleeting, visual impressions which began to develop. The first such correlation had to do with the odd sensation of an external, artificial restraint on my memory.

I felt that the snatches of sight I experienced had a profound and terrible meaning, and a frightful connexion with myself, but that some purposeful influence held me from grasping that meaning and that connexion. Then came that queerness about the element of time, and with it desperate efforts to place the fragmentary dream-glimpses in the chronological and spatial pattern.

The glimpses themselves were at first merely strange rather than horrible. I would seem to be in an enormous vaulted chamber whose lofty stone aroinings were well-nigh lost in the shadows overhead. In whatever time or place the scene might be, the principle of the arch was known as fully and used as extensively as by the Romans.

There were colossal, round windows and high, arched doors, and pedestals or tables each as tall as the height of an ordinary room. Vast shelves of dark wood lined the walls, holding what seemed to be volumes of immense size with strange hieroglyphs on their backs.

The exposed stonework held curious carvings, always in curvilinear mathematical designs, and there were chiselled inscriptions in the same characters that the huge books bore. The dark granite masonry was of a monstrous megathic type, with lines of convex-topped blocks fitting the concave-bottomed courses which rested upon them.

There were no chairs, but the tops of the vast pedestals were littered with books, papers, and what seemed to be writing materials - oddly figured jars of a purplish metal, and rods with stained tips. Tall as the pedestals were, I seemed at times able to view them from above. On some of them were great globes of luminous crystal serving as lamps, and inexplicable machines formed of vitreous tubes and metal rods.

The windows were glazed, and latticed with stout-looking bars. Though I dared not approach and peer out them, I could see from where I was the waving tops of singular fern-like growths. The floor was of massive octagonal flagstones, while rugs and hangings were entirely lacking.

Later I had visions of sweeping through Cyclopean corridors of stone, and up and down gigantic inclined planes of the same monstrous masonry. There were no stairs anywhere, nor was any passageway less than thirty feet wide. Some of the structures through which I floated must have towered in the sky for thousands of feet.

There were multiple levels of black vaults below, and never-opened trapdoors, sealed down with metal bands and holding dim suggestions of some special peril.

I seemed to be a prisoner, and horror hung broodingly over everything I saw. I felt that the mocking curvilinear hieroglyphs on the walls would blast my soul with their message were I not guarded by a merciful ignorance.

Still later my dreams included vistas from the great round windows, and from the titanic flat roof, with its curious gardens, wide barren area, and high, scalloped parapet of stone, to which the topmost of the inclined planes led.

There were, almost endless leagues of giant buildings, each in its garden, and ranged along paved roads fully 200 feet wide. They differed greatly in aspect, but few were less than 500 feet square or a thousand feet high. Many seemed so limitless that they must have had a frontage of several thousand feet, while some shot up to mountainous altitudes in the grey, steamy heavens.

They seemed to be mainly of stone or concrete, and most of them embodied the oddly curvilinear type of masonry noticeable in the building that held me. Roofs were flat and garden-covered, and tended to have scalloped parapets. Sometimes there were terraces and higher levels, and wide, cleared spaces amidst the gardens. The great roads held hints of motion, but in the earlier visions I could not resolve this impression into details.

In certain places I beheld enormous dark cylindrical towers which climbed far above any of the other structures. These appeared to be of a totally unique nature and shewed signs of prodigious age and dilapidation. They were built of a bizarre type of square-cut basalt masonry, and tapered slightly toward their rounded tops. Nowhere in any of them could the least traces of windows or other apertures save huge doors be found. I noticed also some lower buildinigs - all crumbling with the weathering of aeons - which resembled these dark, cylindrical towers in basic architecture. Around all these aberrant piles of square-cut masonry there hovered an inexplicable aura of menace and concentrated fear, like that bred by the sealed trap-doors.

The omnipresent gardens were almost terrifying in their strangeness, with bizarre and unfamiliar forms of vegetation nodding over broad paths lined with curiously carven monoliths. Abnormally vast fern-like growths predominated - some green, and some of a ghastly, fungoid pallor.

Among them rose great spectral things resembling calamites, whose bamboo-like trunks towered to fabulous heights. Then there were tufted forms like fabulous cycads, and grotesque dark-green shrubs and trees of coniferous aspect.

Flowers were small, colourless, and unrecognizable, blooming in geometrical beds and at large among the greenery.

In a few of the terrace and roof-top gardens were larger and more blossoms of most offensive contours and seeming to suggest artificial breeding. Fungi of inconceivable size, outlines, and colours speckled the scene in patterns bespeaking some unknown but well-established horticultural tradition. In the larger gardens on the ground there seemed to be some attempt to preserve the irregularities of Nature, but on the roofs there was more selectiveness, and more evidences of the topiary art.

The sides were almost always moist and cloudy, and sometimes I would seem to witness tremendous rains. Once in a while, though, there would be glimpses of the sun - which looked abnormally large - and of the moon, whose markings held a touch of difference from the normal that I could never quite fathom. When - very rarely - the night sky was clear to any extent, I beheld constellations which were nearly beyond recognition. Known outlines were sometimes approximated, but seldom duplicated; and from the position of the few groups I could recognize, I felt I must be in the earth's southern hemisphere, near the Tropic of Capricorn.

The far horizon was always steamy and indistinct, but I could see that great jungles of unknown tree-ferns, calamites, lepidodendra, and sigillaria lay outside the city, their fantastic frondage waving mockingly in the shifting vapours. Now and then there would be suggestions of motion in the sky, but these my early visions never resolved.

By the autumn of 1914 I began to have infrequent dreams of strange floatings over the city and through the regions around it. I saw interminable roads through forests of fearsome growths with mottled, fluted, and banded trunks, and past other cities as strange as the one which persistently haunted me.

I saw monstrous constructions of black or iridescent tone in glades and clearings where perpetual twilight reigned, and traversed long causeways over swamps so dark that I could tell but little of their moist, towering vegetation.

Once I saw an area of countless miles strewn with age-blasted basaltic ruins whose architecture had been like that of the few windowless, round-topped towers in the haunting city.

And once I saw the sea - a boundless, steamy expanse beyond the colossal stone piers of an enormous town of domes and arches. Great shapeless sugggestions of shadow moved over it, and here and there its surface was vexed ith anomalous spoutings.

As I have said, it was not immediately that these wild visions began to hold their terrifying quality. Certainly, many persons have dreamed intrinsically stranger things - things compounded of unrelated scraps of daily life, pictures,and reading, and arranged in fantastically novel forms by the unchecked caprices of sleep.

For some time I accepted the visions as natural, even though I had never before been an extravagant dreamer. Many of the vague anomalies, I argued, must have come from trivial sources too numerous to track down; while others seemed to reflect a common text book knowledge of the plants and other conditions of the primitive world of a hundred and fifty million years ago - the world of the Permian or Triassic age.

In the course of some months, however, the element of terror did figure with accumulating force. This was when the dreams began so unfailingly to have the aspect of memories, and when my mind began to link them with my growing abstract disturbances - the feeling of mnemonic restraint, the curious impressions regarding time, and sense of a loathsome exchange with my secondary personality of 1908-13, and, considerably later, the inexplicable loathing of my own person.

As certain definite details began to enter the dreams, their horror increased a thousandfold - until by October, 1915, I felt I must do something. It was then that I began an intensive study of other cases of amnesia and visions, feeling that I might thereby obectivise my trouble and shake clear of its emotional grip.

However, as before mentioned, the result was at first almost exactly opposite. It disturbed me vastly to find that my dreams had been so closely duplicated; especially since some of the accounts were too early to admit of any geological knowledge - and therefore of any idea of primitive landscapes - on the subjects' part.

What is more, many of these accounts supplied very horrible details and explanations in connexion with the visions of great buildings and jungle gardens - and other things. The actual sights and vague impressions were bad enough, but what was hinted or asserted by some of the other dreamers savored of madness and blasphemy. Worst of all, my own pseudo-memory was aroused to milder dreams and hints of coming revelations. And yet most doctors deemed my course, on the whole, an advisable one.

I studied psychology systematically, and under the prevailing stimulus my son Wingate did the same - his studies leading eventually to his present professorship. In 1917 and 1918 I took special courses at Miskatonic. Meanwhile, my examination of medical, historical, and anthropological records became indefatigable, involving travels to distant libraries, and finally including even a reading of the hideous books of forbidden elder lore in which my secondary personality had been so disturbingly interested.

Some of the latter were the actual copies I had consulted in my altered state, and I was greatly disturbed by certain marginal notations and ostensible corrections of the hideous text in a script and idiom which somehow seemed oddly unhuman.

These markings were mostly in the respective languages of the various books, all of which the writer seemed to know with equal, though obviously academic, facility. One note appended to von Junzt's Unaussprechlichen Kulten, however, was alarmingly otherwise. It consisted of certain curvilinear hieroglyphs in the same ink as that of the German corrections, but following no recognized human pattern. And these hieroglyphs were closely and unmistakably alien to the characters constantly met with in my dreams - characters whose meaning I would sometimes momentarily fancy I knew, or was just on the brink of recalling.

To complete my black confusion, my librarians assured me that, in view of previous examinations and records of consultation of the volumes in question, all of these notations must have been made by myself in my secondary state. This despite the fact that I was and still am ignorant of three of the languages involved.

Piecing together the scattered records, ancient and modern, anthropological and medical, I found a fairly consistent mixture of myth and hallucination whose scope and wildness left me utterly dazed. Only one thing consoled me, the fact that the myths were of such early existence. What lost knowledge could have brought pictures of the Palaeozoic or Mesozoic landscape into these primitive fables, I could not even guess; but the pictures had been there. Thus, a basis existed for the formation of a fixed type of delusion.

Cases of amnesia no doubt created the general myth pattern - but afterward the fanciful accretions of the myths must have reacted on amnesia sufferers and coloured their pseudo-memories. I myself had read and heard all the early tales during my memory lapse - my quest had amply proved that. Was it not natural, then, for my subsequent dreams and emotional impressions to become coloured and moulded by what my memory subtly held over from my secondary state?

A few of the myths had significant connexions with other cloudy legends of the pre-human world, especially those Hindu tales involving stupefying gulfs of time and forming part of the lore of modern theosopists.

Primal myth and modern delusion joined in their assumption that mankind is only one - perhaps the least - of the highly evolved and dominant races of this planet's long and largely unknown career. Things of inconceivable shape, they implied, had reared towers to the sky and delved into every secret of Nature before the first amphibian forbear of man had crawled out of the hot sea 300 million years ago.

Some had come down from the stars; a few were as old as the cosmos itself, others had arisen swiftly from terrene germs as far behind the first germs of our life-cycle as those germs are behind ourselves. Spans of thousands of millions of years, and linkages to other galaxies and universes, were freely spoken of. Indeed, there was no such thing as time in its humanly accepted sense.

But most of the tales and impressions concerned a relatively late race, of a queer and intricate shape, resembling no life-form known to science, which had lived till only fifty million years before the advent of man. This, they indicated, was the greatest race of all because it alone had conquered the secret of time.

It had learned all things that ever were known or ever would be known on the earth, through the power of its keener minds to project themselves into the past and future, even through gulfs of millions of years, and study the lore of every age. From the accomplishments of this race arose all legends of prophets, including those in human mythology.

In its vast libraries were volumes of texts and pictures holding the whole of earth's annals-histories and descriptions of every species that had ever been or that ever would be, with full records of their arts, their achievements, their languages, and their psychologies.

With this aeon-embracing knowledge, the Great Race chose from every era and life-form such thoughts, arts, and processes as might suit its own nature and situation. Knowledge of the past, secured through a kind of mind-casting outside the recognized senses, was harder to glean than knowledge of the future.

In the latter case the course was easier and more material. With suitable mechanical aid a mind would project itself forward in time, feeling its dim, extra-sensory way till it approached the desired period. Then, after preliminary trials, it would seize on the best discoverable representative of the highest of that period's life-forms. It would enter the organism's brain and set up therein its own vibrations, while the displaced mind would strike back to the period of the displacer, remaining in the latter's body till a reverse process was set up.

The projected mind, in the body of the organism of the future, would then pose as a member of the race whose outward form it wore, learning as quickly as possible all that could be learned of the chosen age and its massed information and techniques.

Meanwhile the displaced mind, thrown back to the displacer's age and body, would be carefully guarded. It would be kept from harming the body it occupied, and would be drained of all its knowledge by trained questioners. Often it could be questioned in its own language, when previous quests into the future had brought back records of that language.

If the mind came from a body whose language the Great Race could not physically reproduce, clever machines would be made, on which the alien speech could be played as on a musical instrument.

The Great Race's members were immense rugose cones ten feet high, and with head and other organs attached to foot-thick, distensible limbs spreading from the apexes. They spoke by the clicking or scraping of huge paws or claws attached to the end of two of their four limbs, and walked by the expansion and contraction of a viscous layer attached to their vast, ten-foot bases.

When the captive mind's amazement and resentment had worn off, and when - assuming that it came from a body vastly different from the Great Race's - it had lost its horror at its unfamiliar temporary form, it was permitted to study its new environment and experience a wonder and wisdom approximating that of its displacer.

With suitable precautions, and in exchange for suitable services, it was allowed to rove all over the habitable world in titan airships or on the huge boatlike atomic-engined vehicles which traversed the great roads, and to delve freely into the libraries containing the records of the planet's past and future.

This reconciled many captive minds to their lot; since none were other than keen, and to such minds the unveiling of hidden mysteries of earth-closed chapters of inconceivable pasts and dizzying vortices of future time which include the years ahead of their own natural ages-forms always, despite the abysmal horrors often unveiled, the supreme experience of life.

Now and then certain captives were permitted to meet other captive minds seized from the future - to exchange thoughts with consciousnesses living a hundred or a thousand or a million years before or after their own ages. And all were urged to write copiously in their own languages of themselves and their respective periods; such documents to be filed in the great central archives.

It may be added that there was one special type of captive whose privileges were far greater than those of the majority. These were the dying permanent exiles, whose bodies in the future had been seized by keen-minded members of the Great Race who, faced with death, sought to escape mental extinction.

Such melancholy exiles were not as common as might be expected, since the longevity of the Great Race lessened its love of life - especially among those superior minds capable of projection. From cases of the permanent projection of elder minds arose many of those lasting changes of personality noticed in later history - including mankind's.

As for the ordinary cases of exploration - when the displacing mind had learned what it wished in the future, it would build an apparatus like that which had started its flight and reverse the process of projection. Once more it would be in its own body in its own age, while the lately captive mind would return to that body of the future to which it properly belonged.

Only when one or the other of the bodies had died during the exchange was this restoration impossible. In such cases, of course, the exploring mind had - like those of the death-escapers - to live out an alien-bodied life in the future; or else the captive mind - like the dying permanent exiles - had to end its days in the form and past age of the Great Race.

This fate was least horrible when the captive mind was also of the Great Race - a not infrequent occurrence, since in all its periods that race was intensely concerned with its own future. The number of dying permanent exiles of the Great Race was very slight - largely because of the tremendous penalties attached to displacements of future Great Race minds by the moribund.

Through projection, arrangements were made to inflict these penalties on the offending minds in their new future bodies - and sometimes forced re-exchanges were effected.

Complex cases of the displacement of exploring or already captive minds by minds in various regions of the past had been known and carefully rectified. In every age since the discovery of mind projection, a minute but well-recognised element of the population consisted of Great Race minds from past ages, sojourning for a longer or shorter while.

When a captive mind of alien origin was returned to its own body in the future, it was purged by an intricate mechanical hypnosis of all it had learned in the Great Race's age - this because of certain troublesome consequences inherent in the general carrying forward of knowledge in large quantities.

The few existing instances of clear transmission had caused, and would cause at known future times, great disasters. And it was largely in consequence of two cases of this kind - said the old myths - that mankind had learned what it had concerning the Great Race.

Of all things surviving physically and directly from that aeon-distant world, there remained only certain ruins of great stones in far places and under the sea, and parts of the text of the frightful Pnakotic Manuscripts.

Thus the returning mind reached its own age with only the faintest and most fragmentary visions of what it had undergone since its seizure. All memories that could be eradicated were eradicated, so that in most cases only a dream-shadowed blank stretched back to the time of the first exchange. Some minds recalled more than others, and the chance joining of memories had at rare times brought hints of the forbidden past to future ages.

There probably never was a time when groups or cults did not secretly cherish certain of these hints. In the Necronomicon the presence of such a cult among human beings was suggested - a cult that sometimes gave aid to minds voyaging down the aeons from the days of the Great Race.

And, meanwhile, the Great Race itself waxed well-nigh omniscient, and turned to the task of setting up exchanges with the minds of other planets, and of exploring their pasts and futures. It sought likewise to fathom the past years and origin of that black, aeon-dead orb in far space whence its own mental heritage had come - for the mind of the Great Race was older than its bodily form.

The beings of a dying elder world, wise with the ultimate secrets, had looked ahead for a new world and species wherein they might have long life; and had sent their minds en masse into that future race best adapted to house them - the cone-shaped beings that peopled our earth a billion years ago.

Thus the Great Race came to be, while the myriad minds sent backward were left to die in the horror of strange shapes. Later the race would again face death, yet would live through another forward migration of its best minds into the bodies of others who had a longer physical span ahead of them.

Such was the background of intertwined legend and hallucination. When, around 1920, I had my researches in coherent shape, I felt a slight lessening of the tension which their earlier stages had increased. After all, and in spite of the fancies prompted by blind emotions, were not most of my phenomena readily explainable? Any chance might have turned my mind to dark studies during the amnesia - and then I read the forbidden legends and met the members of ancient and ill-regarded cults. That, plainly, supplied the material for the dreams and disturbed feelings which came after the return of memory.

As for the marginal notes in dream-hieroglyphs and languages unknown to me, but laid at my door by librarians - I might easily have picked up a smattering of the tongues during my secondary state, while the hieroglyphs were doubtless coined by my fancy from descriptions in old legends, and afterward woven into my dreams. I tried to verify certain points through conversation with known cult leaders, but never succeeded in establishing the right connexions.

At times the parallelism of so many cases in so many distant ages continued to worry me as it had at first, but on the other hand I reflected that the excitant folklore was undoubtedly more universal in the past than in the present.

Probably all the other victims whose cases were like mine had had a long and familiar knowledge of the tales I had learned only when in my secondary state. When these victims had lost their memory, they had associated themselves with the creatures of their household myths - the fabulous invaders supposed to displace men's minds - and had thus embarked upon quests for knowledge which they thought they could take back to a fancied, non-human past.

Then, when their memory returned, they reversed the associative process and thought of themselves as the former captive minds instead of as the displacers. Hence the dreams and pseudo-memories following the conventional myth pattern.

Despite the seeming cumbrousness of these explanations, they came finally to supersede all others in my mind - largely because of the greater weakness of any rival theory. And a substantial number of eminent psychologists and anthropologists gradually agreed with me.

The more I reflected, the more convincing did my reasoning seem; till in the end I had a really effective bulwark against the visions and impressions which still assailed me. Suppose I did see strange things at night? These were only what I had heard and read of. Suppose I did have odd loathings and perspectives and pseudo-memories? These, too, were only echoes of myths absorbed in my secondary state. Nothing that I might dream, nothing that I might feel, could be of any actual significance.

Fortified by this philosophy, I greatly improved in nervous equilibrium, even though the visions - rather than the abstract impressions - steadily became more frequent and more disturbingly detailed. In 1922 I felt able to undertake regular work again, and put my newly gained knowledge to practical use by accepting an instructorship in psychology at the university.

My old chair of political economy had long been adequately filled - besides which, methods of teaching economics had changed greatly since my heyday. My son was at this time just entering on the post-graduate studies leading to his recent professorship, and we worked together a great deal.