The woman stared up into the vacancy out of which the voice came, her eyes dilated, and her lips trembling with the movement of her lower jaw.

She saw a jug of water get up off the table and empty itself over her companion's face. Then she fainted, too.

When Pent-Ah came to himself and sat up, he saw an elderly gentleman, tall and erect as a man in the prime of life, standing over him with the blackthorn in one hand and the water-jug in the other.

"I am not going to ask what you two are doing here," he said sternly, "because I know already. If I called the police I could send you both to prison for house-breaking and attempted robbery; but I don't want any fuss, and perhaps you have been punished enough for the present. Ah, I see your accomplice is coming round. You came in by the window, I suppose. Now get out by it as quick as you can, and mind you keep your mouths shut as to what has happened to-night. If you don't," he went on, suddenly changing into Coptic, "beware of the anger of your Lord--of Him who never forgives!"

The man scrambled to his feet, whimpering:

"I go, Lord, I go, and my lips shall be silent as the lips of----"

He cast a frightened glance towards the mummy-case, and then, grasping the woman roughly by the arm, he dragged her towards the open window, saying:

"Come, Neb-Anat, come ere the wrath of our Lord consumes us!"

"Why, where's the Mummy, Dad?" said Miss Nitocris, as she came into her father's study just before breakfast the next morning, and looked in amazement at the empty case.

"Stolen, my dear, I am sorry to say," replied the Professor gravely.

"Did you hear any noises in the house last night, or were you sleeping too soundly?"

"I seem to have an idea that I did," she said, "but only a dim one; I thought I only dreamt it. But did you, Dad? Do tell me all about it.

What a horrible shame to steal that lovely Mummy! And it was so like me, too. I believe I should have got quite fond of it."

"Yes, dear," continued the Professor, speaking, as she thought, a little nervously. "There was a noise, and I heard it. I came down here and turned the light on. I found the window open and the Mummy gone--and that is all I can tell you about it."

CHAPTER V

ACROSS THE THRESHOLD

After breakfast Professor Marmion, according to his practice on fine days, lit his pipe, and went out for a stroll on the Common to put in a little hard thinking, while Miss Nitocris, after seeing to certain household matters, sat down in his study and read the papers, in order that she might be able to give him a synopsis of the world's news at lunch. He did not read the newspapers himself, except, perhaps, in the train, when he had nothing better to do. He took no interest in politics, for one thing, and he had still less interest in professional cricket and football, racing, and what is generally called sport. He had a fixed opinion that all the events happening in the world which really mattered, not even excepting the proceedings of learned societies and the criminal and civil Law Courts, could be adequately recorded on a couple of sheets of notepaper. In other words, he had an absolute contempt for everything that makes a newspaper sell, and therefore his daughter had very soon learnt to omit these fascinating items entirely.

Curiously enough, his mind seemed to be running on this subject of all things that morning. He had been reading an article in the _Fortnightly_ on the growing sensationalism, and therefore the general decadence of the English Press a day or two before, and this had got connected up in his thoughts with the amazing happenings of the last twelve hours, and he asked himself what would happen if he were to give the narrative of his experiences in a letter to the _Times_, supported by the authority of his own distinguished and irreproachable name.

Certainly it would be the most sensational communication that had ever appeared in a newspaper. In a day or two, granted always that the _Times_ had no doubts as to his sanity and printed the letter, the whole Press would be ablaze with it; Wimbledon would be besieged by reporters eager to see miracles; and then they would go away and write lurid articles, some about the miracles, if they saw them, and some about an absolutely new form of conjuring that he had invented. Then the scientific Press would take it up, and a very merry battle of wits would begin. He smiled gravely as he thought of the inkshed that would come to pa.s.s in a _combat a l'outrance_ between the Three Dimensionists and the Four Dimensionists, and how the distinguished scientists on each side would hurl their ponderous thunderbolts of wisdom against each other.

Then there would be the religious folk to deal with, for naturally no theologian of any enterprise or self-respect could see a fight like that going on without taking a hand in it. The Churches, of course, had a monopoly of miracles, or at least the traditions of them. The Christian Scientists, blatantly, claimed to work them now, but their subjects died with disgusting regularity. So he quickly came to the conclusion that, if he were once to state in plain English that he could accomplish the seemingly impossible; that he, a mere mortal, could make himself independent of the ordinary conditions of time and s.p.a.ce and break with impunity all the laws which govern the physical universe, he would simply make himself the centre of a vortex of frenzied disputation which would shake the social, religious, and scientific worlds to their foundations, and that would certainly not be a pleasant position for an eminent and respected scientist, who was already a certain number of years past middle age--to say nothing of the very real harm that might be done.

Of course, he could settle all the disputes instantly, and dazzle the whole world into the bargain by simply delivering a lecture, say, before the Royal Society, on the existence of a world of four dimensions, and then proving by ocular demonstration that it does exist; but what would happen then? Simply intellectual anarchy.

Every belief that man had held for ages would be negatived. For instance, if there is one dogma to which humanity has clung with unanimous consistency, it is to the dogma that two and two make four.

What if he were to prove--as, of course, he could do now that this mysterious hand, outstretched through the mists of the far past, had led him across the horizon which divides the two states of Existence--that, under certain circ.u.mstances, they would also make three or five? What if he demonstrated that even the axioms of Euclid could, under different conditions, be both true and false at the same time?

No, the thought of overthrowing such a venerable authority and plunging the scientific world into a hopeless state of intellectual chaos sent a shudder through his nerves. He could not do it.

And yet it was only the bare, solid truth that he did possess these powers. The dream of the death-bridal of Nitocris might possibly have been nothing more than just a dream, or possibly the revival of an episode in a past existence; but the other experiences certainly were not. He had taken off his ring without unbending his finger. Yes, he could do it again now; it was just as easy as taking it off in the ordinary way. He certainly had not been dreaming when the Mummy had become Queen Nitocris and given him the wine. He could not have been mad or dreaming, because his daughter was there. The episode of the strange stealers who had come into his house--that too was real, for they had left their lamp and the man's shoes behind them, and the Mummy was gone!

He took a piece of string out of his pocket, tied the two ends, and then with the greatest ease tied another knot in the string without undoing the first.

A motor-car came humming along the road towards him, and he began to think what this place was like a thousand years before motors were heard of. That instant the motor vanished, and he found himself standing in a little glade surrounded by huge forest trees with not so much as a foot-track in sight. He made his way through the trees in what he remembered to be the direction of the road, and presently, through an opening avenue, he saw the sun glittering upon something moving, and heard voices; and then past the end of the avenue half a dozen armoured knights, followed by their squires and a string of men-at-arms guarding a covered waggon, and after these came a motley little crowd of travellers, some on horseback and some on foot, evidently taking advantage of the escort to protect them from robbers.

"Dear me!" said the Professor to himself, not without a little shiver of apprehension, "this is very interesting. I seem to have put myself back into the tenth century. Yes, that is certainly tenth-century armour that they're wearing. I mustn't let them see me, or there's no telling what they'd think of an elderly gentleman in a soft hat and a twentieth-century morning suit. But perhaps," he went on with his reasoning, "they can't see me at all. My condition is N to the fourth now. There's a thousand years between us; I forgot that. At any rate, I'll try it."

He walked quickly down the avenue, and stood by the side of the rugged path looking at the strange spectacle. No one took the slightest notice of him. And then a chill of awful loneliness struck him. Although he could see and move and hear, and, no doubt, eat and drink in this world, he was unexistent as regards the inhabitants of it, and yet he knew perfectly well he was standing by the side of the road where the motor-car ought to be, and over there, a few hundred yards away, Niti would be sitting in her room or walking in the garden--and she wouldn't be born for nearly a thousand years yet.

It was certainly somewhat disquieting, this power of living in two existences and different ages, but it was a matter that would take some little time to get accustomed to.

The next instant the cavalcade and the forest had vanished, and there was the motor-car, just spinning past him. He was on the Wimbledon Common of the twentieth century once more. He stroked his clean-shaven chin with his finger and thumb, and walked slowly along the path by the side of the road, and then across the gra.s.s towards the flagstaff.

"I think I begin to see it now," he murmured. "Of course, life, that is to say real, intellectual, or, as some would say, spiritual life, is, after all, the coefficient of that totally unexplainable thing called thought which enables us to explain most things except itself. Time and s.p.a.ce and location are only realities to us in so far that we can see them. A human being born blind, dumb, deaf, and without feeling would still, I suppose, be a human being, because it would be conscious of existence; it would breathe and know that its heart was beating, but without sight or sensation there could be no idea of s.p.a.ce--time, to it, would be a meaningless series of breaths or heartbeats. Without touch or sight it could have no idea of form or size, which are merely conditions of s.p.a.ce, and both the past and the future would be absolutely non-existent for it."

He paused, and walked on a little way in silence, arguing silently with himself as to the correctness of these premises. Then he began aloud again:

"Yes, I think that's about right. And now, suppose that such a being became endowed with the natural senses, one by one. It would go through all the processes of the physical and mental evolution of humanity until it reached the highest of human attributes--the ability to think, and therefore to reason. In other words, from a merely living organism it would, in the old Scriptural language, have become a living soul. That is, obviously, what the words in Genesis were really intended to mean.

It would then become capable of development, of proceeding from the partly-known to the more fully known, until, granted perfect physical and mental health, it reached what are generally called the limits of human knowledge."

The Professor's thumb and finger went up to his chin again. He walked another two or three hundred yards in silence; then he recommenced his spoken argument with himself:

"Limits of human knowledge? Yes, that sounds all very well in ordinary language, but are there any? Who was it said that a man trying to reach those limits was like the child who saw a rainbow for the first time, and started out to find the place where it rested? The simile is not bad, not by any means. Just in the same way, we try to imagine the limits of time and s.p.a.ce, and we can't do it. Only infinity of s.p.a.ce and duration are possible, and yet we can't grasp them; still, they are the only possible states in which we can exist. And now, as I have had a glimpse of the past, I wonder what this place would be like in ten thousand years?

"Good heavens, how cold it is!" He shivered, and b.u.t.toned up his coat, and continued, looking about him on the vast snow-field dotted with hummocks of ice which lay bleak and lifeless about him: "Ah, I suppose either the Gulf Stream has got diverted, or the earth's axis has shifted and we are in another glacial epoch.

"WE!"

Again the shock of utter isolation struck him, but it seemed to hit him harder this time. The world that he had been born in lay ten thousand years behind him. For all he knew, he might be standing upon what was now the earth's North Pole. Civilisation, as he had known it, might have been wiped off the face of the earth, and the remnants of humanity flung back into savagery. He looked up at the sun, and saw that it was almost exactly where it had been, and that it had not perceptibly diminished in power.

The idea was not at all pleasant to him, and very naturally his thoughts turned back once more to his cosy home that had been on the edge of Wimbledon Common ten thousand years ago. He remembered, with a curious sort of thrill, some notes which he had to complete that morning for his lecture--and in the same instant he was walking back across the turf towards his house through the warm May sunshine.

"Yes," he said to himself, as he drew a deep breath of the sweet spring air. "I was right; that's it. The fourth dimension is a form of duration in some way correlated with s.p.a.ce. I shall have to work that out in the light of the greater knowledge, which Her vanished Majesty has given me, and which I almost attained to in Egypt. Wherefore, existence in a state of four dimensions, or the world of N4, as I have always called it, is, roughly speaking, one. Time and s.p.a.ce are, as it were, two sides of the same shield, and a person living in that world can see both of them at once. Wherefore, past, present, future, length, breadth, thickness, here and there are all the same thing to him. It's a great pity there isn't a fourth dimensional language as well, so that one could state these things a little more precisely. But that, of course, is out of the question.

"Really, I can hardly make myself understand it as far as words and phrases are concerned; still, there it is; and now the question arises: Having got this power, as I certainly have, of transferring myself from one existence to another by a mere effort of thought, because it is very evident that this power is really only an extension or an exaltation--confound the language of the third dimension--I can't say it! Although I understand what it is, it won't go into words. What am I to do with it? Its possibilities are, of course, a little appalling--that is to say, from the point of view of N3. I have not the slightest desire to shake the fabric of Society to pieces, as I could do, and still less have I taste for spending the rest of my scientific career in what the world would very easily believe to be conjuring tricks. I hope I am not going to be another of the unnumbered proofs of Solomon's wisdom when he said, 'Whoso getteth knowledge, getteth sorrow.' I wonder what sort of advice Her late Majesty of Egypt----

"Dear me, what nonsense I am talking! Her late Majesty? That won't do at all--she has reached the Higher Plane too, so, of course, she can't be dead----"

And then with the force of a powerful electric shock, the terrible fact struck him that, for those who had reached that plane, there was no death! Here was a new light on the weird problem which he had somehow been called upon to deal with.

"I wonder what Her Majesty would really think of it?" he murmured, after a few moments of mental bewilderment. "Dear me, who's that?"

He looked up, and, to his utter amazement, he saw Queen Nitocris, arrayed exactly as she had been on that terrible night of her bridal with Menkau-Ra, walking towards him; a perfect incarnation of beauty, but----

"Oh dear me!" said the Professor, "this will never do. Good heavens!

everybody in Wimbledon knows me, and--well, of course, Her Majesty is very lovely and all that; but what on earth would people think if any one saw me strolling across the Common in company with an Egyptian Queen--to say nothing of the costume--and the image of my own daughter, too!"

The figure approached, and the Queen, dazzlingly and bewilderingly beautiful, held out her hands to him, and their eyes met and they looked at each other across the gulf of fifty centuries. Impelled by an irresistible impulse coming from whence he knew not, he clasped them in his, and said, apparently by no volition of his own, in the Ancient Tongue: