It was in March when the fresh element entered his lighter preliminary dreaming, and the nightmare shape of Brown Jenkin began to be companioned by the nebulous blur which grew more and more to resemble a bent old woman. This addition disturbed him more than he could account for, but finally he decided that it was like an ancient crone whom he had twice actually encountered in the dark tangle of lanes near the abandoned wharves. On those occasions the evil, sardonic, and seemingly unmotivated stare of the beldame had set him almost shivering—especially the first time when an overgrown rat darting across the shadowed mouth of a neighboring alley had made him think irrationally of Brown Jenkin. Now, he reflected, those nervous fears were being mirrored in his disordered dreams. That the influence of the old house was unwholesome he could not deny, but traces of his early morbid interest still held him there. He argued that the fever alone was responsible for his nightly fantasies, and that when the touch abated he would be free from the monstrous visions. Those visions, however, were of absorbing vividness and convincingness, and whenever he awaked he retained a vague sense of having undergone much more than he remembered. He was hideously sure that in unrecalled dreams he had talked with both Brown Jenkin and the old woman, and that they had been urging him to go somewhere with them and to meet a third being of greater potency.

Toward the end of March he began to pick up in his mathematics, though the other studies bothered him increasingly. He was getting an intuitive knack for solving Riemannian equations, and astonished Professor Upham by his comprehension of fourth-dimensional and other problems which had floored all the rest of the class. One afternoon there was a discussion of possible freakish curvatures in space, and of theoretical points of approach or even contact between our part of the cosmos and various other regions as distant as the farthest stars or the transgalactic gulfs themselves—or even as fabulously remote as the tentatively conceivable cosmic units beyond the whole Einsteinian space-time continuum. Gilman's handling of this theme filled everyone with admiration, even though some of his hypothetical illustrations caused an increase in the always plentiful gossip about his nervous and solitary eccentricity. What made the students shake their heads was his sober theory that a man might—given mathematical knowledge admittedly beyond all likelihood of human acquirement—step deliberately from the earth to any other celestial body which might lie at one of an infinity of specific points in the cosmic pattern.

Such a step, he said, would require only two stages; first, a passage out of the three-dimensional sphere we know, and second, a passage back to the three-dimensional sphere at another point, perhaps one of infinite remoteness. That this could be accomplished without loss of life was in many cases conceivable. Any being from any part of three-dimensional space could probably survive in the fourth dimension; and its survival of the second stage would depend upon what alien part of three-dimensional space it might select for its re-entry. Denizens of some planets might be able to live on certain others —even planets belonging to other galaxies, or to similar dimensional phases of other space-time continua—though of course there must be vast numbers of mutually uninhabitable even though mathematically juxtaposed bodies or zones of space.

It was also possible that the inhabitants of a given dimensional realm could survive entry to many unknown and incomprehensible realms of additional or indefinitely multiplied dimensions—be they within or outside the given space-time continuum—and that the converse would be likewise true. This was a matter for speculation, though one could be fairly certain that the type of mutation involved in a passage from any given dimensional plane to the next higher one would not be destructive of biological integrity as we understand it. Gilman could not be very clear about his reasons for this last assumption, but his haziness here was more than overbalanced by his clearness on other complex points. Professor Upham especially liked his demonstration of the kinship of higher mathematics to certain phases of magical lore transmitted down the ages from an ineffable antiquity—human or pre-human—whose knowledge of the cosmos and its laws was greater than ours.

Around 1 April Gilman worried considerably because his slow fever did not abate. He was also troubled by what some of his fellow lodgers said about his sleep-walking. It seemed that he was often absent from his bed and that the creaking of his floor at certain hours of the night was remarked by the man in the room below. This fellow also spoke of hearing the tread of shod feet in the night; but Gilman was sure he must have been mistaken in this, since shoes as well as other apparel were always precisely in place in the morning. One could develop all sorts of aural delusions in this morbid old house—for did not Gilman himself, even in daylight, now feel certain that noises other than rat-scratching came from the black voids beyond the slanting wall and above the slanting ceiling? His pathologically sensitive ears began to listen for faint footfalls in the immemorially sealed loft overhead, and sometimes the illusion of such things was agonizingly realistic.

However, he knew that he had actually become a somnambulist; for twice at night his room had been found vacant, though with all his clothing in place. Of this he had been assured by Frank Elwood, the one fellow-student whose poverty forced him to room in this squalid and unpopular house. Elwood had been studying in the small hours and had come up for help on a differential equation, only to find Gilman absent. It had been rather presumptuous of him to open the unlocked door after knocking had failed to rouse a response, but he had needed the help very badly and thought that his host would not mind a gentle prodding awake. On neither occasion, though, had Gilman been there; and when told of the matter he wondered where he could have been wandering, barefoot and with only his night clothes on. He resolved to investigate the matter if reports of his sleep-walking continued, and thought of sprinkling flour on the floor of the corridor to see where his footsteps might lead. The door was the only conceivable egress, for there was no possible foothold outside the narrow window.

As April advanced, Gilman's fever-sharpened ears were disturbed by the whining prayers of a superstitious loom-fixer named Joe Mazurewicz who had a room on the ground floor. Mazurewicz had told long, rambling stories about the ghost of old Keziah and the furry sharp-fanged, nuzzling thing, and had said he was so badly haunted at times that only his silver crucifix—given him for the purpose by Father Iwanicki of St. Stanislaus' Church—could bring him relief. Now he was praying because the Witches' Sabbath was drawing near. May Eve was Walpurgis Night, when hell's blackest evil roamed the earth and all the slaves of Satan gathered for nameless rites and deeds. It was always a very bad lime in Arkham, even though the fine folks up in Miskatonic Avenue and High and Saltonstall Streets pretended to know nothing about it. There would be bad doings, and a child or two would probably be missing. Joe knew about such things, for his grandmother in the old country had heard tales from her grandmother. It was wise to pray and count one's beads at this season. For three months Keziah and Brown Jenkin had not been near Joe's room, nor near Paul Choynski's room, nor anywhere else—and it meant no good when they held off like that. They must be up to something.

Gilman dropped in at the doctor's office on the sixteenth of the month, and was surprised to find his temperature was not as high as he had feared. The physician questioned him sharply, and advised him to see a nerve specialist. On reflection, he was glad he had not consulted the still more inquisitive college doctor. Old Waldron, who had curtailed his activities before, would have made him take a rest—an impossible thing now that he was so close to great results in his equations. He was certainly near the boundary between the known universe and the fourth dimension, and who could say how much farther he might go?

But even as these thoughts came to him he wondered at the source of his strange confidence. Did all of this perilous sense of imminence come from the formulae on the sheets he covered day by day? The soft, stealthy, imaginary footsteps in the sealed loft above were unnerving. And now, too, there was a growing feeling that somebody was constantly persuading him to do something terrible which he could not do. How about the somnambulism? Where did he go sometimes in the night? And what was that faint suggestion of sound which once in a while seemed to trickle through the confusion of identifiable sounds even in broad daylight and full wakefulness? Its rhythm did not correspond to anything on earth, unless perhaps to the cadence of one or two unmentionable Sabbat-chants, and sometimes he feared it corresponded to certain attributes of the vague shrieking or roaring in those wholly alien abysses of dream.

The dreams were meanwhile getting to be atrocious. In the lighter preliminary phase the evil old woman was now of fiendish distinctness, and Gilman knew she was the one who had frightened him in the slums. Her bent back, long nose, and shrivelled chin were unmistakable, and her shapeless brown garments were like those he remembered. The expression on her face was one of hideous malevolence and exultation, and when he awaked he could recall a croaking voice that persuaded and threatened. He must meet the Black Man and go with them all to the throne of Azathoth at the center of ultimate chaos. That was what she said. He must sign the book of Azathoth in his own blood and take a new secret name now that his independent delvings had gone so far. What kept him from going with her and Brown Jenkin and the other to the throne of Chaos where the thin flutes pipe mindlessly was the fact that he had seen the name "Azathoth" in the Necronomicon, and knew it stood for a primal evil too horrible for description.

The old woman always appeared out of thin air near the corner where the downward slant met the inward slant. She seemed to crystallize at a point closer to the ceiling than to the floor, and every night she was a little nearer and more distinct before the dream shifted. Brown Jenkin, too was always a little nearer at the last, and its yellowish-white fangs glistened shockingly in that unearthly violet phosphorescence. Its shrill loathsome tittering struck more and more into Gilman's head, and he could remember in the morning how it had pronounced the words "Azathoth" and "Nyarlathotep".

In the deeper dreams everything was likewise more distinct, and Gilman felt that the twilight abysses around him were those of the fourth dimension. Those organic entities whose motions seemed least flagrantly irrelevant and unmotivated were probably projections of life-forms from our own planet, including human beings. What the others were in their own dimensional sphere or spheres he dared not try to think. Two of the less irrelevantly moving things —a rather large congeries of iridescent, prolately spheroidal bubbles and a very much smaller polyhedron of unknown colors and rapidly shifting surface angles—seemed to take notice of him and follow him about or float ahead as he changed position among the titan prisms, labyrinths, cube-and-plane clusters and quasi-buildings; and all the while the vague shrieking and roaring waxed louder and louder, as if approaching some monstrous climax of utterly unendurable intensity.

During the night of 19-20 April the new development occurred. Gilman was half involuntarily moving about in the twilight abysses with the bubble-mass and the small polyhedron floating ahead when he noticed the peculiarly regular angles formed by the edges of some gigantic neighboring prism-clusters. In another second he was out of the abyss and standing tremulously on a rocky hillside bathed in intense, diffused green light. He was barefooted and in his nightclothes. and when he tried to walk discovered that he could scarcely lift his feet. A swirling vapor hid everything but the immediate sloping terrain from sight, and he shrank from the thought of the sounds, that might surge out of that vapor.

Then he saw the two shapes laboriously crawling toward him—the old woman and the little furry thing. The crone strained up to her knees and managed to cross her arms in a singular fashion, while Brown Jenkin pointed in a certain direction with a horribly anthropoid forepaw which it raised with evident difficulty. Spurred by an impulse he did not originate, Gilman dragged himself forward along a course determined by the angle of the old woman's arms and the direction of the small monstrosity's paw, and before he had shuffled three steps he was back in the twilight abysses. Geometrical shapes seethed around him, and he fell dizzily and interminably. At last he woke in his bed in the crazily angled garret of the eldritch old house.

He was good for nothing that morning, and stayed away from all his classes. Some unknown attraction was pulling his eyes in a seemingly irrelevant direction, for he could not help staring at a certain vacant spot on the floor. As the day advanced, the focus of his unseeing eyes changed position, and by noon he had conquered the impulse to stare at vacancy. About two o'clock he went out for lunch and as he threaded the narrow lanes of the city he found himself turning always to the southeast. Only an effort halted him at a cafeteria in Church Street, and after the meal he felt the unknown pull still more strongly.

He would have to consult a nerve specialist after all—perhaps there was a connection with his somnambulism—but meanwhile he might at least try to break the morbid spell himself. Undoubtedly he could still manage to walk away from the pull, so with great resolution he headed against it and dragged himself deliberately north along Garrison Street. By the time he had reached the bridge over the Miskatonic he was in a cold perspiration, and he clutched at the iron railing as he gazed upstream at the ill-regarded island whose regular lines of ancient standing stones brooded sullenly in the afternoon sunlight.

Then he gave a start. For there was a clearly visible living figure on that desolate island, and a second glance told him it was certainly the strange old woman whose sinister aspect had worked itself so disastrously into his dreams. The tall grass near her was moving, too, as if some other living thing were crawling close to the ground. When the old woman began to turn toward him he fled precipitately off the bridge and into the shelter of the town's labyrinthine waterfront alleys. Distant though the island was, he felt that a monstrous and invincible evil could flow from the sardonic stare of that bent, ancient figure in brown.

The southeastwards pull still held, and only with tremendous resolution could Gilman drag himself into the old house and up the rickety stairs. For hours he sat silent and aimless, with his eyes shifting gradually westward. About six o'clock his sharpened ears caught the whining prayers of Joe Mazurewicz two floors below, and in desperation he seized his hat and walked out into the sunset-golden streets, letting the now directly southward pull carry him where it might. An hour later darkness found him in the open fields beyond Hangman's Brook, with the glimmering spring stars shining ahead. The urge to walk was gradually changing to an urge to leap mystically into space, and suddenly he realized just where the source of the pull lay.

It was in the sky. A definite point among the stars had a claim on him and was calling him. Apparently it was a point somewhere between Hydra and Argo Navis, and he knew that he had been urged toward it ever since he had awaked soon after dawn. In the morning it had been underfoot, and now it was roughly south but stealing toward the west. What was the meaning of this new thing? Was he going mad? How long would it last? Again mustering his resolution, Gilman turned and dragged himself back to the sinister old house.