He pressed his ear against the panel, and his eyes shone brightly in the moonlight.
"It is some living thing," he whispered to himself.

"Methinks it is surely some human thing.

Rats can make strange sounds, I know, but not such sounds as these.

A human being, and within the thickness of the wall! How can such a thing be?
I never heard the like before.

It comes nearer--I hear the groping of hands close beside mine ear.