ham across the flat
roof in the direction of a dim semicircular haze of light. Graham
obeyed.

"Mind!" said a voice, as Graham stumbled against a cable. "Between them
and not across them," said the voice. And, "We must hurry."

"Where are the people?" said Graham. "The people you said awaited me?"

The stranger did not answer. He left Graham's arm as the path grew
narrower, and led the way with rapid strides. Graham followed blindly.
In a minute he found himself running. "Are the others coming?" he
panted, but received no reply. His companion glanced back and ran on.
They came to a sort of pathway of open metal-work, transverse to the
direction they had come, and they turned aside to follow this. Graham
looked back, but the snowstorm had hidden the others.

"Come on!" said his guide. Running now, they drew near a little windmill
spinning high in the air. "Stoop," said Graham's guide, and they avoided
an endless band running roaring up to the shaft of the vane. "This
way!" and they were ankle deep in a gutter full of drifted thawing snow,
between two low walls of metal that presently rose waist high. "I will
go first," said the guide. Graham drew his cloak about him and followed.
Then suddenly came a narrow abyss across which the gutter leapt to the
snowy darkness of the further side. Graham peeped over the side once and
the gulf was black. For a moment he regretted his flight. He dared not
look again, and his brain spun as he waded through the half liquid snow.

Then out of the gutter they clambered and hurried across a wide flat
space damp with thawing snow, and for half its extent dimly translucent
to lights that went to and fro underneath. He hesitated at this unstable
looking substance, but his guide ran on unheeding, and so they came to
and clambered up slippery steps to the rim of a great dome of glass.
Round this they went. Far below a number of people seemed to be dancing,
and music filtered through the dome.... Graham fancied he heard a
shouting through the snowstorm, and his guide hurried him on with a new
spurt of haste. They clambered panting to a space of huge windmills, one
so vast that only the lower edge of its vans came rushing into sight and
rushed up again and was lost in the night and the snow. They hurried for
a time through the colossal metallic tracery of its supports, and came
at last above a place of moving platforms like the place into which
Graham had looked from the balcony. They crawled