"Like a clock!"

"What is it?"

"What can it be?"

"Count," was Cavor's belated suggestion, and at that word the striking
ceased.

The silence, the rhythmic disappointment of the silence, came as a fresh
shock. For a moment one could doubt whether one had ever heard a sound. Or
whether it might not still be going on. Had I indeed heard a sound?

I felt the pressure of Cavor's hand upon my arm. He spoke in an
undertone, as though he feared to wake some sleeping thing. "Let us keep
together," he whispered, "and look for the sphere. We must get back to the
sphere. This is beyond our understanding."

"Which way shall we go?"

He hesitated. An intense persuasion of presences, of unseen things about
us and near us, dominated our minds. What could they be? Where could they
be? Was this arid desolation, alternately frozen and scorched, only the
outer rind and mask of some subterranean world? And if so, what sort of
world? What sort of inhabitants might it not presently disgorge upon us?

And then, stabbing the aching stillness as vivid and sudden as an
unexpected thunderclap, came a clang and rattle as though great gates of
metal had suddenly been flung apart.