I Introduction
II The Machine
III The Time Traveller Returns
IV Time Travelling
V In the Golden Age
VI The Sunset of Mankind
VII A Sudden Shock
VIII Explanation
IX The Morlocks
X When Night Came
XI The Palace of Green Porcelain
XII In the Darkness
XIII The Trap of the White Sphinx
XIV The Further Vision
XV The Time Traveller’s Return
XVI After the Story
Epilogue

I.
Introduction

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 burnt 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 runs 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-Dimensional 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 three 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 recognised? But certainly it traced such a line, and that
line, therefore, we must conclude, was along the Time-Dimension.”