It was this movement of the dog's, I think, that gave me the first
twinge of _real_ fear. I had been considerably startled when the lights
burnt first green and then red; but had been momentarily under the
impression that the change was due to some influx of noxious gas into
the room. Now, however, I saw that it was not so; for the candles burned
with a steady flame, and showed no signs of going out, as would have
been the case had the change been due to fumes in the atmosphere.

I did not move. I felt distinctly frightened; but could think of
nothing better to do than wait. For perhaps a minute, I kept my glance
about the room, nervously. Then I noticed that the lights had commenced
to sink, very slowly; until presently they showed minute specks of red
fire, like the gleamings of rubies in the darkness. Still, I sat
watching; while a sort of dreamy indifference seemed to steal over me;
banishing altogether the fear that had begun to grip me.

Away in the far end of the huge old-fashioned room, I became conscious
of a faint glow. Steadily it grew, filling the room with gleams of
quivering green light; then they sank quickly, and changed--even as the
candle flames had done--into a deep, somber crimson that strengthened,
and lit up the room with a flood of awful glory.

The light came from the end wall, and grew ever brighter until its
intolerable glare caused my eyes acute pain, and involuntarily I closed
them. It may have been a few seconds before I was able to open them. The
first thing I noticed was that the light had decreased, greatly; so that
it no longer tried my eyes. Then, as it grew still duller, I was aware,
all at once, that, instead of looking at the redness, I was staring
through it, and through the wall beyond.