presently attracted my attention, was the presence of certain
circular wells, several, as it seemed to me, of a very great depth.
One lay by the path up the hill, which I had followed during my
first walk. Like the others, it was rimmed with bronze, curiously
wrought, and protected by a little cupola from the rain. Sitting by
the side of these wells, and peering down into the shafted darkness,
I could see no gleam of water, nor could I start any reflection
with a lighted match. But in all of them I heard a certain sound:
a thud--thud--thud, like the beating of some big engine; and I
discovered, from the flaring of my matches, that a steady current of
air set down the shafts. Further, I threw a scrap of paper into the
throat of one, and, instead of fluttering slowly down, it was at
once sucked swiftly out of sight.

'After a time, too, I came to connect these wells with tall towers
standing here and there upon the slopes; for above them there was
often just such a flicker in the air as one sees on a hot day above
a sun-scorched beach. Putting things together, I reached a strong
suggestion of an extensive system of subterranean ventilation, whose
true import it was difficult to imagine. I was at first inclined to
associate it with the sanitary apparatus of these people. It was an
obvious conclusion, but it was absolutely wrong.

'And here I must admit that I learned very little of drains and
bells and modes of conveyance, and the like conveniences, during my
time in this real future. In some of these visions of Utopias and
coming times which I have read, there is a vast amount of detail
about building, and social arrangements, and so forth. But while
such details are easy enough to obtain when the whole world is
contained in one's imagination, they are altogether inaccessible to