they sought.

It was difficult on the outside of the wall to say exactly which was the
precise spot which it might be supposed the body had fallen on; but, by
following the wall in its entire length, surely they would come upon it.

They did so; but, to their surprise, they got from its commencement to
its further extremity without finding any dead body, or even any
symptoms of one having lain there.

At some parts close to the wall there grew a kind of heath, and,
consequently, the traces of blood would be lost among it, if it so
happened that at the precise spot at which the strange being had seemed
to topple over, such vegetation had existed. This was to be ascertained;
but now, after traversing the whole length of the wall twice, they came
to a halt, and looked wonderingly in each other's faces.

"There is nothing here," said Harry.

"Nothing," added his brother.

"It could not have been a delusion," at length said Mr. Marchdale, with
a shudder.

"A delusion?" exclaimed the brother! "That is not possible; we all saw
it."

"Then what terrible explanation can we give?"

"By heavens! I know not," exclaimed Henry. "This adventure surpasses all