"What, exactly, were the experiences of this young couple?" I asked.

"Chiefly noises, footsteps echoing through a silent house. Once the
shadow of a man, or so it seemed, was thrown suddenly upon the wall by a
ray of moonlight, and once the curtains and sheets of a bed were found
torn, as if hands, finding nothing else to destroy, had taken vengeance
upon them. Of course, this all comes second-hand from Dr. Bates."

"And is probably unconsciously exaggerated," said Quarles. "The ordinary
man is almost certain to overstate and to emphasize unduly one part of
the evidence."

"That was my feeling exactly," returned Randall, "so I spent a night in
that haunted room myself. The result was disappointing."

"Did nothing happen?" I asked.

"There was no direct manifestation--at least I saw nothing, and I do not
think I heard anything, but I am sure that I felt something. It was very
vague. You know it is my theory," Randall went on, addressing me, "that
different individuals are sensitive to different influences. For example,
let us suppose a certain spot is haunted, a spot where something
particularly desperate has taken place in the past. Now I believe that A,
B, and C, all sensitive to supernatural influences, may watch there and
seeing nothing, but that D, being sensitive to that particular influence,
or moving on that particular plane, may be successful. In another case,
where D fails, A, B, or C may be successful. I think it is this fact
which accounts for the comparatively small number of experiences which we
are able to authenticate. It was an article of the professor's, setting