subject of a manifestation.

"About an hour later, the whistling ceased quite suddenly, and Tassoc
went off again to bed. I went back to mine, also, and eventually got
another spell of sleep.

"In the morning, I went along to the room. I found the seals on the door
intact. Then I went in. The window seals and the hair were all right; but
the seventh hair across the great fireplace was broken. This set me
thinking. I knew that it might, very possibly, have snapped, through my
having tensioned it too highly; but then, again, it might have been
broken by something else. Yet, it was scarcely possible that a man, for
instance, could have passed between the six unbroken hairs; for no one
would ever have noticed them, entering the room that way, you see; but
just walked through them, ignorant of their very existence.

"I removed the other hairs, and the seals. Then I looked up the chimney.
It went up straight, and I could see blue sky at the top. It was a big,
open flue, and free from any suggestion of hiding places, or corners.
Yet, of course, I did not trust to any such casual examination, and after
breakfast, I put on my overalls, and climbed to the very top, sounding
all the way; but I found nothing.

"Then I came down, and went over the whole of the room--floor, ceiling,
and walls, mapping them out in six-inch squares, and sounding with both
hammer and probe. But there was nothing abnormal.

"Afterward, I made a three-weeks search of the whole castle, in the same
thorough way; but found nothing. I went even further, then; for at night,
when the whistling commenced, I made a microphone test. You see, if the