I

The Time Traveller (for so it will be convenient to speak of

him) was expounding a recondite matter to us. His grey eyes

shone and twinkled, and his usually pale face was flushed and

animated. The fire burned brightly, and the soft radiance of the

incandescent lights in the lilies of silver caught the bubbles

that flashed and passed in our glasses. Our chairs, being his

patents, embraced and caressed us rather than submitted to be sat

upon, and there was that luxurious after-dinner atmosphere when

thought roams gracefully free of the trammels of precision. And

he put it to us in this way--marking the points with a lean

forefinger--as we sat and lazily admired his earnestness over

this new paradox (as we thought it:) and his fecundity.



`You must follow me carefully. I shall have to controvert one

or two ideas that are almost universally accepted. The geometry,

for instance, they taught you at school is founded on a

misconception.'



`Is not that rather a large thing to expect us to begin upon?'

said Filby, an argumentative person with red hair.



`I do not mean to ask you to accept anything without reasonable

ground for it. You will soon admit as much as I need from you.

You know of course that a mathematical line, a line of thickness

NIL, has no real existence. They taught you that? Neither has

a mathematical plane. These things are mere abstractions.'



`That is all right,' said the Psychologist.



`Nor, having only length, breadth, and thickness, can a cube

have a real existence.'



`There I object,' said Filby. `Of course a solid body may

exist. All real things--'



`So most people think. But wait a moment. Can an

INSTANTANEOUS cube exist?'



`Don't follow you,' said Filby.



`Can a cube that does not last for any time at all, have a real

existence?'



Filby became pensive. `Clearly,' the Time Traveller proceeded,

`any real body must have extension in FOUR directions: it must

have Length, Breadth, Thickness, and--Duration. But through a

natural infirmity of the flesh, which I will explain to you in a

moment, we incline to overlook this fact. There are really four

dimensions, three which we call the three planes of Space, and a

fourth, Time. There is, however, a tendency to draw an unreal

distinction between the former three dimensions and the latter,

because it happens that our consciousness moves intermittently in

one direction along the latter from the beginning to the end of

our lives.'



`That,' said a very young man, making spasmodic efforts to

relight his cigar over the lamp; `that . . . very clear indeed.'



`Now, it is very remarkable that this is so extensively

overlooked,' continued the Time Traveller, with a slight

accession of cheerfulness. `Really this is what is meant by the

Fourth Dimension, though some people who talk about the Fourth

Dimension do not know they mean it. It is only another way of

looking at Time. THERE IS NO DIFFERENCE BETWEEN TIME AND ANY OF

THE THREE DIMENSIONS OF SPACE EXCEPT THAT OUR CONSCIOUSNESS MOVES

ALONG IT. But some foolish people have got hold of the wrong

side of that idea. You have all heard what they have to say

about this Fourth Dimension?'



`_I_ have not,' said the Provincial Mayor.



`It is simply this. That Space, as our mathematicians have it,

is spoken of as having three dimensions, which one may call

Length, Breadth, and Thickness, and is always definable by

reference to three planes, each at right angles to the others.

But some philosophical people have been asking why THREE

dimensions particularly--why not another direction at right

angles to the other three?--and have even tried to construct a

Four-Dimension geometry. Professor Simon Newcomb was expounding

this to the New York Mathematical Society only a month or so ago.

You know how on a flat surface, which has only two dimensions,

we can represent a figure of a three-dimensional solid, and

similarly they think that by models of thee dimensions they could

represent one of four--if they could master the perspective of

the thing. See?'



`I think so,' murmured the Provincial Mayor; and, knitting his

brows, he lapsed into an introspective state, his lips moving as

one who repeats mystic words. `Yes, I think I see it now,' he

said after some time, brightening in a quite transitory manner.



`Well, I do not mind telling you I have been at work upon this

geometry of Four Dimensions for some time. Some of my results

are curious. For instance, here is a portrait of a man at eight

years old, another at fifteen, another at seventeen, another at

twenty-three, and so on. All these are evidently sections, as it

were, Three-Dimensional representations of his Four-Dimensioned

being, which is a fixed and unalterable thing.



`Scientific people,' proceeded the Time Traveller, after the

pause required for the proper assimilation of this, `know very

well that Time is only a kind of Space. Here is a popular

scientific diagram, a weather record. This line I trace with my

finger shows the movement of the barometer. Yesterday it was so

high, yesterday night it fell, then this morning it rose again,

and so gently upward to here. Surely the mercury did not trace

this line in any of the dimensions of Space generally recognized?

But certainly it traced such a line, and that line, therefore,

we must conclude was along the Time-Dimension.'



`But,' said the Medical Man, staring hard at a coal in the

fire, `if Time is really only a fourth dimension of Space, why is

it, and why has it always been, regarded as something different?

And why cannot we move in Time as we move about in the other

dimensions of Space?'



The Time Traveller smiled. `Are you sure we can move freely in

Space? Right and left we can go, backward and forward freely

enough, and men always have done so. I admit we move freely in

two dimensions. But how about up and down? Gravitation limits

us there.'



`Not exactly,' said the Medical Man. `There are balloons.'



`But before the balloons, save for spasmodic jumping and the

inequalities of the surface, man had no freedom of vertical

movement.' `Still they could move a little up and down,' said

the Medical Man.



`Easier, far easier down than up.'



`And you cannot move at all in Time, you cannot get away from

the present moment.'



`My dear sir, that is just where you are wrong. That is just

where the whole world has gone wrong. We are always getting away

from the present movement. Our mental existences, which are

immaterial and have no dimensions, are passing along the

Time-Dimension with a uniform velocity from the cradle to the

grave. Just as we should travel DOWN if we began our existence

fifty miles above the earth's surface.'



`But the great difficulty is this,' interrupted the

Psychologist. `You CAN move about in all directions of Space,

but you cannot move about in Time.'



`That is the germ of my great discovery. But you are wrong to

say that we cannot move about in Time. For instance, if I am

recalling an incident very vividly I go back to the instant of

its occurrence: I become absent-minded, as you say. I jump back

for a moment. Of course we have no means of staying back for any

length of Time, any more than a savage or an animal has of

staying six feet above the ground. But a civilized man is better

off than the savage in this respect. He can go up against

gravitation in a balloon, and why should he not hope that

ultimately he may be able to stop or accelerate his drift along

the Time-Dimension, or even turn about and travel the other way?'



`Oh, THIS,' began Filby, `is all--'



`Why not?' said the Time Traveller.



`It's against reason,' said Filby.



`What reason?' said the Time Traveller.



`You can show black is white by argument,' said Filby, `but you

will never convince me.'



`Possibly not,' said the Time Traveller. `But now you begin to

see the object of my investigations into the geometry of Four

Dimensions. Long ago I had a vague inkling of a machine--'



`To travel through Time!' exclaimed the Very Young Man.



`That shall travel indifferently in any direction of Space and

Time, as the driver determines.'



Filby contented himself with laughter.



`But I have experimental verification,' said the Time

Traveller.



`It would be remarkably convenient for the historian,' the

Psychologist suggested. `One might travel back and verify the

accepted account of the Battle of Hastings, for instance!'



`Don't you think you would attract attention?' said the Medical

Man. `Our ancestors had no great tolerance for anachronisms.'



`One might get one's Greek from the very lips of Homer and

Plato,' the Very Young Man thought.



`In which case they would certainly plough you for the

Little-go. The German scholars have improved Greek so much.'



`Then there is the future,' said the Very Young Man. `Just

think! One might invest all one's money, leave it to accumulate

at interest, and hurry on ahead!'



`To discover a society,' said I, `erected on a strictly

communistic basis.'



`Of all the wild extravagant theories!' began the Psychologist.



`Yes, so it seemed to me, and so I never talked of it until--'



`Experimental verification!' cried I. `You are going to verify

THAT?'



`The experiment!' cried Filby, who was getting brain-weary.



`Let's see your experiment anyhow,' said the Psychologist,

`though it's all humbug, you know.'



The Time Traveller smiled round at us. Then, still smiling

faintly, and with his hands deep in his trousers pockets, he

walked slowly out of the room, and we heard his slippers

shuffling down the long passage to his laboratory.



The Psychologist looked at us. `I wonder what he's got?'



`Some sleight-of-hand trick or other,' said the Medical Man,

and Filby tried to tell us about a conjurer he had seen at

Burslem; but before he had finished his preface the Time

Traveller came back, and Filby's anecdote collapsed.



The thing the Time Traveller held in his hand was a glittering

metallic framework, scarcely larger than a small clock, and very

delicately made. There was ivory in it, and some transparent

crystalline substance. And now I must be explicit, for this that

follows--unless his explanation is to be accepted--is an

absolutely unaccountable thing. He took one of the small

octagonal tables that were scattered about the room, and set it

in front of the fire, with two legs on the hearthrug. On this

table he placed the mechanism. Then he drew up a chair, and sat

down. The only other object on the table was a small shaded

lamp, the bright light of which fell upon the model. There were

also perhaps a dozen candles about, two in brass candlesticks

upon the mantel and several in sconces, so that the room was

brilliantly illuminated. I sat in a low arm-chair nearest the

fire, and I drew this forward so as to be almost between the Time

Traveller and the fireplace. Filby sat behind him, looking over

his shoulder. The Medical Man and the Provincial Mayor watched

him in profile from the right, the Psychologist from the left.

The Very Young Man stood behind the Psychologist. We were all on

the alert. It appears incredible to me that any kind of trick,

however subtly conceived and however adroitly done, could have

been played upon us under these conditions.



The Time Traveller looked at us, and then at the mechanism.

`Well?' said the Psychologist.



`This little affair,' said the Time Traveller, resting his

elbows upon the table and pressing his hands together above the

apparatus, `is only a model. It is my plan for a machine to

travel through time. You will notice that it looks singularly

askew, and that there is an odd twinkling appearance about this

bar, as though it was in some way unreal.' He pointed to the

part with his finger. `Also, here is one little white lever, and

here is another.'



The Medical Man got up out of his chair and peered into the

thing. `It's beautifully made,' he said.



`It took two years to make,' retorted the Time Traveller.

Then, when we had all imitated the action of the Medical Man, he

said: `Now I want you clearly to understand that this lever,

being pressed over, sends the machine gliding into the future,

and this other reverses the motion. This saddle represents the

seat of a time traveller. Presently I am going to press the

lever, and off the machine will go. It will vanish, pass into

future Time, and disappear. Have a good look at the thing. Look

at the table too, and satisfy yourselves there is no trickery. I

don't want to waste this model, and then be told I'm a quack.'



There was a minute's pause perhaps. The Psychologist seemed

about to speak to me, but changed his mind. Then the Time

Traveller put forth his finger towards the lever. `No,' he said

suddenly. `Lend me your hand.' And turning to the Psychologist,

he took that individual's hand in his own and told him to put out

his forefinger. So that it was the Psychologist himself who sent

forth the model Time Machine on its interminable voyage. We all

saw the lever turn. I am absolutely certain there was no

trickery. There was a breath of wind, and the lamp flame jumped.

One of the candles on the mantel was blown out, and the little

machine suddenly swung round, became indistinct, was seen as a

ghost for a second perhaps, as an eddy of faintly glittering

brass and ivory; and it was gone--vanished! Save for the lamp

the table was bare.



Everyone was silent for a minute. Then Filby said he was

damned.



The Psychologist recovered from his stupor, and suddenly looked

under the table. At that the Time Traveller laughed cheerfully.

`Well?' he said, with a reminiscence of the Psychologist. Then,

getting up, he went to the tobacco jar on the mantel, and with

his back to us began to fill his pipe.



We stared at each other. `Look here,' said the Medical Man,

`are you in earnest about this? Do you seriously believe that

that machine has travelled into time?'



`Certainly,' said the Time Traveller, stooping to light a spill

at the fire. Then he turned, lighting his pipe, to look at the

Psychologist's face. (The Psychologist, to show that he was not

unhinged, helped himself to a cigar and tried to light it uncut.)

`What is more, I have a big machine nearly finished in there'--he

indicated the laboratory--`and when that is put together I mean

to have a journey on my own account.'



`You mean to say that that machine has travelled into the

future?' said Filby.



`Into the future or the past--I don't, for certain, know

which.'



After an interval the Psychologist had an inspiration. `It

must have gone into the past if it has gone anywhere,' he said.



`Why?' said the Time Traveller.



`Because I presume that it has not moved in space, and if it

travelled into the future it would still be here all this time,

since it must have travelled through this time.'



`But,' I said, `If it travelled into the past it would have

been visible when we came first into this room; and last Thursday

when we were here; and the Thursday before that; and so forth!'



`Serious objections,' remarked the Provincial Mayor, with an

air of impartiality, turning towards the Time Traveller.



`Not a bit,' said the Time Traveller, and, to the Psychologist:

`You think. You can explain that. It's presentation below the

threshold, you know, diluted presentation.'



`Of course,' said the Psychologist, and reassured us. `That's

a simple point of psychology. I should have thought of it. It's

plain enough, and helps the paradox delightfully. We cannot see

it, nor can we appreciate this machine, any more than we can the

spoke of a wheel spinning, or a bullet flying through the air.

If it is travelling through time fifty times or a hundred times

faster than we are, if it gets through a minute while we get

through a second, the impression it creates will of course be

only one-fiftieth or one-hundredth of what it would make if it

were not travelling in time. That's plain enough.' He passed

his hand through the space in which the machine had been. `You

see?' he said, laughing.



We sat and stared at the vacant table for a minute or so. Then

the Time Traveller asked us what we thought of it all.



`It sounds plausible enough to-night,' said the Medical Man;

'but wait until to-morrow. Wait for the common sense of the

morning.'



`Would you like to see the Time Machine itself?' asked the Time

Traveller. And therewith, taking the lamp in his hand, he led

the way down the long, draughty corridor to his laboratory. I

remember vividly the flickering light, his queer, broad head in

silhouette, the dance of the shadows, how we all followed him,

puzzled but incredulous, and how there in the laboratory we

beheld a larger edition of the little mechanism which we had seen

vanish from before our eyes. Parts were of nickel, parts of

ivory, parts had certainly been filed or sawn out of rock

crystal. The thing was generally complete, but the twisted

crystalline bars lay unfinished upon the bench beside some sheets

of drawings, and I took one up for a better look at it. Quartz

it seemed to be.



`Look here,' said the Medical Man, `are you perfectly serious?

Or is this a trick--like that ghost you showed us last

Christmas?'



`Upon that machine,' said the Time Traveller, holding the lamp

aloft, `I intend to explore time. Is that plain? I was never

more serious in my life.'



None of us quite knew how to take it.



I caught Filby's eye over the shoulder of the Medical Man, and

he winked at me solemnly.

****

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