"It seems to be pretty certain," he said, "that this thing is the wing
of a Desmodus or Vampire Bat. Now, according to our authority"--he
touched a work which lay open on the other arm of his chair--"these are
natives of tropical America, therefore the presence of a living vampire
bat in Surrey is not to be anticipated. I am personally satisfied,
however, that this unpleasant fragment has been preserved in some way."

"You mean that it is part of a specimen from someone's collection?"

"Quite possibly. But even a collection of such bats would be quite a
novelty. I don't know that I can recollect one outside the Museums. To
follow this bat wing business further: there was one very curious point
in the Colonel's narrative. You recollect his reference to a native
girl who had betrayed certain information to the manager of the
estate?"

I nodded rapidly.

"A bat wing was affixed to the wall of her hut and she died, according
to our informant, of a lingering sickness. Now this lingering sickness
might have been anaemia, and anaemia may be induced, either in man or
beast, by frequent but unsuspected visits of a Vampire Bat."

"Good heavens, Harley!" I exclaimed, "what a horrible idea."

"It _is_ a horrible idea, but in countries infested by these creatures
such things happen occasionally. I distinctly recollect a story which I
once heard, of a little girl in some district of tropical America
falling into such a decline, from which she was only rescued in