companions, who followed my remarks very carefully and asked several
practical questions as to how they should proceed to set it right. When
I had made it clear to them, I returned to the main chamber of the
machine and took a good look at it to satisfy my own curiosity. It was
obvious at a glance that the story of the fuller s-earth was the merest
fabrication, for it would be absurd to suppose that so powerful an
engine could be designed for so inadequate a purpose. The walls were of
wood, but the floor consisted of a large iron trough, and when I came
to examine it I could see a crust of metallic deposit all over it. I
had stooped and was scraping at this to see exactly what it was when I
heard a muttered exclamation in German and saw the cadaverous face of
the colonel looking down at me.
What are you doing there? he asked.
I felt angry at having been tricked by so elaborate a story as that
which he had told me. I was admiring your fuller s-earth, said I; I
think that I should be better able to advise you as to your machine if
I knew what the exact purpose was for which it was used.
The instant that I uttered the words I regretted the rashness of my
speech. His face set hard, and a baleful light sprang up in his grey
eyes.
Very well, said he, you shall know all about the machine. He took
a step backward, slammed the little door, and turned the key in the
lock. I rushed towards it and pulled at the handle, but it was quite
secure, and did not give in the least to my kicks and shoves. Hullo!
I yelled. Hullo! Colonel! Let me out!
And then suddenly in the silence I heard a sound which sent my heart
into my mouth. It was the clank of the levers and the swish of the
leaking cylinder. He had set the engine at work. The lamp still stood
upon the floor where I had placed it when examining the trough. By its
light I saw that the black ceiling was coming down upon me, slowly,
jerkily, but, as none knew better than myself, with a force which must
within a minute grind me to a shapeless pulp. I threw myself,
screaming, against the door, and dragged with my nails at the lock. I
implored the colonel to let me out, but the remorseless clanking of the
levers drowned my cries. The ceiling was only a foot or two above my
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